Find the product.
-$$( 9 y + x ) ( 9 y - x )$$
A) $81 y ^ { 2 } - 18 x y - x ^ { 2 }$
B) $81 y ^ { 2 } + 18 x y - x ^ { 2 }$
C) $18 y ^ { 2 } - x ^ { 2 }$
D) $81 y ^ { 2 } - x ^ { 2 }$

Question

Quizplus · Accepted Answer

This is an application of the difference of squares formula, $a^2 - b^2 = (a + b)(a - b)$. Here, $a = 9y$ and $b = x$, so the product is $81y^2 - x^2$.

Find the Product (9y+x)(9y−x)( 9 y + x ) ( 9 y - x )(9y+x)(9y−x)

Find the Product $( 9 y + x ) ( 9 y - x )$