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

Question

Quizplus · Accepted Answer

To multiply $(9x - y)^2$, use the formula $(a - b)^2 = a^2 - 2ab + b^2$, where $a = 9x$ and $b = y$. This results in $81x^2 - 18xy + y^2$.

Multiply - (9x−y)2( 9 x - y ) ^ { 2 }(9x−y)2

Multiply
- $( 9 x - y ) ^ { 2 }$