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Factor out the greatest common factor. $$6 x^{4}-18 x^{3}+12 x^{2}$$

Short Answer

Expert verified
The factored form of the polynomial \(6x^{4} - 18x^{3} + 12x^{2}\) is \(6x^{2}(x^{2} - 3x+2)\).

Step by step solution

01

Identify the Greatest Common Factor

The given expression is \(6x^{4} - 18x^{3} + 12x^{2}\). The largest number that's a common factor for 6, -18 and 12 is 6. The smallest power of \(x\) common to all terms is \(x^2\). Thus, the greatest common factor is \(6x^{2}\).
02

Factor Out the Greatest Common Factor

Factor out \(6x^{2}\) from each term in the expression. This provides us with the equivalent expression: \(6x^{2}(x^{2} - 3x+2)\).
03

Check your work

Use the distributive property to check your work. When you multiply \(6x^{2}\) back into each term of \(x^{2} - 3x+2\), you should get the original expression. \(6x^{2} * x^{2} = 6x^{4}\), \(6x^{2} * -3x = -18x^{3}\), and \(6x^{2} * 2 = 12x^{2}\). Adding these up gives the original expression \(6x^{4} - 18x^{3} + 12x^{2}\).

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Key Concepts

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

Greatest Common Factor
When factoring polynomials, one of the first steps is to look for the greatest common factor (GCF). This is the largest expression that can be evenly divided out of each term in the polynomial. In the exercise, the polynomial given is \(6x^{4} - 18x^{3} + 12x^{2}\).

Think of the GCF as the biggest piece of mathematical 'pie' that can be shared by all the terms in your expression. For numbers, it's the highest number that evenly divides all the coefficients, and for variables, it's the variable with the lowest exponent that's present in all terms. In our example, the coefficients 6, -18, and 12 all share a GCF of 6, and since each term contains an \(x\) raised to at least the second power, \(x^{2}\) is also part of the GCF. This makes \(6x^{2}\) the GCF of our polynomial expression.

Extracting the GCF simplifies the polynomial and makes further calculations more manageable. It's like untangling a knot; once you remove the largest common tangle, the rest of the process becomes much smoother.
Distributive Property
The distributive property is a powerful tool in algebra that allows us to simplify and manipulate expressions. It states that multiplying a sum by a number is the same as multiplying each addend of the sum by the number and then adding the products. In essence, it 'distributes' the multiplication over addition.

Symbolically, it's expressed as \(a(b + c) = ab + ac\). Applying this property in reverse is essential for factoring, as it helps verify that you've factored a polynomial correctly. For our exercise, after factoring out the GCF \(6x^{2}\), we used the distributive property to multiply it by the resulting polynomial \(x^{2} - 3x + 2\) to check our work. If the distributive property is applied correctly, we should arrive back at the original polynomial, confirming that our factoring was accurate.
Polynomial Expressions
Polynomial expressions are algebraic expressions that consist of variables, constants, and exponents combined using addition, subtraction, multiplication, and non-negative integer exponents. They can be simple, with just one term like \(x^{2}\), or more complex with multiple terms like in the exercise \(6x^{4} - 18x^{3} + 12x^{2}\).

Each part of a polynomial is called a term, and terms are separated by plus or minus signs. The degree of a polynomial is the highest exponent of the variable in the expression, which indicates the polynomial's broadest scope of influence. For example, the degree of the expression \(6x^{4}\) is four.

Understanding polynomials is crucial as they form the basis for many other areas in mathematics and are used to model numerous real-world scenarios. The process of factoring polynomials is essentially breaking them down into simpler 'building blocks' which can reveal useful properties and solutions to equations.

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Most popular questions from this chapter

Exercises \(159-161\) will help you prepare for the material covered in the next section. In parts (a) and (b), complete each statement. a. \(\frac{b^{7}}{b^{3}}=\frac{b \cdot b \cdot b \cdot b \cdot b \cdot b \cdot b}{b \cdot b \cdot b}=b^{2}\) b. \(\frac{b^{8}}{b^{2}}=\frac{b \cdot b \cdot b \cdot b \cdot b \cdot b \cdot b \cdot b}{b \cdot b}=b^{?}\) c. Generalizing from parts (a) and (b), what should be done with the exponents when dividing exponential expressions with the same base?

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