Q59. - Algebra 1

Question

Factor each polynomial, if possible. If the polynomial cannot be factored, write prime.

${\mathit{x}}^{\mathbf{2}}\mathbf{+}\mathbf{12}\mathit{x}\mathbf{+}\mathbf{36}$.

Step-by-Step Solution

Answer

It is a perfect square trinomial of:

${(x+6)}^2$.

Step 1. State the concept for factorization of algebraic expressions.

1. The product of two factors with like signs is positive, and the product of two factors with unlike signs is negative.
2. If x is a variable and m, n are positive integers, then $x^{m+n}=(x^m\times x^n)$

Step 2. State the methods to factorize.

Factoring an algebraic expression means writing the expression as a product of factors.

To verify whether the factors are correct or not, multiply them and check if the result is the original algebraic expression.

Algebraic expressions can be factorized using the common factor method, regrouping like terms together, and also by using algebraic identities.

Step 3. Factorize the expression .

Factorizing the given polynomial:

$\begin{array}{c}{x}^2+12x+36=(x^2+2·x·6+6^2)\\ ={(x+6)}^2\end{array}$

The first term is the perfect square of x and last term is the perfect square of 6 Mid-term is

$2·x·6$

So, by comparing with $a^2+2ab+b^2={(a+b)}^2$

 

It is a perfect square trinomial of: ${(x+6)}^2$.