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Factor each perfect square trinomial. $$x^{2}+4 x+4$$

Short Answer

Expert verified
The factored form of the perfect square trinomial \(x^{2} + 4x + 4\) is \((x + 2)^{2}\).

Step by step solution

01

Identify a, b, and c from the perfect square trinomial

In the perfect square trinomial \(x^{2} + 4x + 4\), we can see that \(a = x\), \(b = 2\), and \(c = 4\). This is because the trinomial has the form \(a^{2} + 2ab + b^{2}\), where \(a = x\), \(2ab = 4x\), and \(b^{2} = 4\). By comparing, we can see that \(b = 2\) since \(2ab = 4x = 2*2*x\), and \(c = 4 = b^{2}\).
02

Substitute a and b into the factored form

Now, we just have to substitute the values of \(a\) and \(b\) into \((a + b)^{2}\). Ths gives us \((x + 2)^{2}\).
03

Check the factored form

Lastly, to be sure about the factoring, we expand the obtained factored form \((x + 2)^{2}\) and we must obtain \(x^{2} + 4x + 4\). Expanding \((x + 2)^{2}\) gives \(x^{2} + 2*2*x + 2^{2} = x^{2} + 4x + 4\).

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Factoring
Factoring is a fundamental concept in algebra that involves breaking down expressions into simpler components called factors. Think of it as taking a complex expression and expressing it as a product of simpler expressions. This is particularly useful for solving equations and simplifying algebraic expressions.

In the context of a perfect square trinomial, such as the one in our example, factoring typically involves recognizing patterns like the square of a binomial. The expression given, \(x^2+4x+4\), can be factored to \((x+2)^2\).

Here's a quick tip to factor perfect square trinomials:
  • Recognize the pattern \(a^2 + 2ab + b^2\), which is a perfect square trinomial that factors into \((a + b)^2\).
  • Identify \(a\), \(b\), and \(2ab\) from the trinomial.
  • Write the square as a binomial squared, \((a + b)^2\).
This will help you quickly identify and factor such expressions, simplifying your algebra problems significantly.
Quadratic Expression
A quadratic expression is a polynomial of degree two, which means its highest power of the variable is two. It often takes the standard form: \(ax^2 + bx + c\). In the context of our exercise, we look at the specific case of a perfect square quadratic expression.

The expression \(x^2 + 4x + 4\) is a perfect square quadratic because it can be expressed as the square of a binomial, \((x+2)^2\).
  • The term \(x^2\) is the square of \(x\) (making it \(a^2\)).
  • The middle term \(4x\) is twice the product of \(x\) and \(2\) (hence \(2ab\)).
  • The constant \(4\) is the square of \(2\) (representing \(b^2\)).
Understanding the structure of quadratic expressions aids in simplifying and solving them by recognizing patterns and special forms, such as perfect square trinomials.
Algebraic Manipulation
Algebraic manipulation involves rearranging and rewriting mathematical expressions using basic algebraic rules. It's a powerful tool that enables you to simplify expressions, solve equations, and factor polynomials efficiently.

In the case of factoring the perfect square trinomial \(x^2+4x+4\), algebraic manipulation allows us to transform the expression into \((x+2)^2\).
To master algebraic manipulation, consider these steps:
  • Identify common patterns or structures in the expression. For perfect square trinomials, look for the form \(a^2 + 2ab + b^2\).
  • Reorganize terms to examine possible factorizations.
  • Keep practicing different types of problems to develop intuition with these algebraic manipulations.
Effective algebraic manipulation can help recognize perfect squares quickly and transform complex algebra problems into simpler calculations.

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Most popular questions from this chapter

Will help you prepare for the material covered in the first section of the next chapter. If \(y=4-x,\) find the value of \(y\) that corresponds to values of \(x\) for each integer starting with \(-3\) and ending with 3

Determine whether each statement makes sense or does not make sense, and explain your reasoning. Although \(20 x^{3}\) appears in both \(20 x^{3}+8 x^{2}\) and \(20 x^{3}+10 x\) I'll need to factor \(20 x^{3}\) in different ways to obtain each polynomial's factorization.

Your local electronics store is having an end-of-the-year sale. The price on a plasma television had been reduced by \(30 \%\) Now the sale price is reduced by another \(30 \% .\) If \(x\) is the television's original price, the sale price can be modeled by $$(x-0.3 x)-0.3(x-0.3 x)$$ a. Factor out \((x-0.3 x)\) from each term. Then simplify the resulting expression. b. Use the simplified expression from part (a) to answer these questions. With a \(30 \%\) reduction followed by a \(30 \%\) reduction, is the television selling at \(40 \%\) of its original price? If not, at what percentage of the original price is it selling?

Will help you prepare for the material covered in the next section. If the width of a rectangle is represented by \(x\) and the length is represented by \(x+200,\) write a simplified algebraic expression that models the rectangle's perimeter.

Determine whether each statement is true or false. If the statement is false, make the necessary change(s) to produce a true statement. The equation \(a x^{2}+c=0, a \neq 0,\) cannot be solved by the quadratic formula.

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