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Factor completely. $$ 49 p^{2}-84 p t+36 t^{2} $$

Short Answer

Expert verified
(7p-6t)^{2}

Step by step solution

01

Identify the form of the quadratic

Recognize that the expression is a quadratic trinomial of the form a^2 - 2ab + b^2
02

Write the given quadratic trinomial

Write the expression as 49p^{2}-84pt+36t^{2}
03

Express as a square of a binomial

Observe that 49p^{2}= (7p)^{2} and 36t^{2}= (6t)^{2}. Also, note that -84pt=2*(7p)*(6t).Therefore, the expression can be written as:(7p - 6t)^{2}
04

Factor completely

Since (7p-6t)^{2} is already factored completely.

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Key Concepts

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

quadratic trinomials
Quadratic trinomials are expressions of the form \( ax^2 + bx + c \), where \( a, b,\) and \( c \) are constants, and \( x \) is a variable. Quadratic trinomials are important because they frequently appear in algebra and higher-level math.

When factoring quadratic trinomials, the goal is to rewrite the expression as a product of simpler binomial expressions. This helps in solving equations and understanding the properties of the original expression.

For example, consider the trinomial \( 49p^2 - 84pt + 36t^2 \). To factor it, you need to recognize patterns and apply specific techniques, such as turning it into a perfect square trinomial.
square of a binomial
A square of a binomial is an expression that results from multiplying a binomial by itself. It usually appears in the form \( (a + b)^2 = a^2 + 2ab + b^2 \) or \( (a - b)^2 = a^2 - 2ab + b^2 \). Recognizing this structure helps in factoring quadratic trinomials efficiently.

In our example, \( 49p^2 - 84pt + 36t^2 \), we observed that it matches the pattern \( a^2 - 2ab + b^2 \). We identified \( 49p^2 = (7p)^2 \) and \( 36t^2 = (6t)^2 \), as well as the middle term \( -84pt = 2 \times 7p \times 6t \). Therefore, this expression is indeed the square of the binomial \( 7p - 6t \).

Thus, we can rewrite it as \( (7p - 6t)^2 \). This shows how powerful recognizing the square of a binomial can be in simplifying complex algebraic expressions.
factorization
Factorization is the process of breaking down an algebraic expression into a product of simpler factors. It is a crucial skill in algebra because it simplifies expressions and makes solving equations more manageable.

In our example of \( 49p^2 - 84pt + 36t^2 \), using the factorization technique allowed us to express it as \( (7p - 6t)^2 \). This is the end goal of factorization: writing the expression in its simplest form.

Understanding how to factor quadratic trinomials and recognizing patterns, like the square of a binomial, are key to mastering factorization. With practice, these techniques become intuitive and incredibly helpful in solving a wide range of mathematical problems.

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