Use Special Products in Polynomial Multiplication
-$$( 9 x + 5 ) ( 9 x - 5 )$$
A) $81 x ^ { 2 } - 25$
B) $x ^ { 2 } - 25$
C) $81 x ^ { 2 } - 90 x - 25$
D) $81 x ^ { 2 } + 90 x - 25$

Question

Quizplus · Accepted Answer

This is an example of the difference of squares formula, $a^2 - b^2 = (a + b)(a - b)$, where $a = 9x$ and $b = 5$, resulting in $81x^2 - 25$.

Use Special Products in Polynomial Multiplication - (9x+5)(9x−5)( 9 x + 5 ) ( 9 x - 5 )(9x+5)(9x−5)

Use Special Products in Polynomial Multiplication
- $( 9 x + 5 ) ( 9 x - 5 )$