Perform the indicated operation: $( 9 x - 4 y ) ^ { 2 }$
A) $81 x ^ { 2 } + 16 y ^ { 2 }$
B) $81 x ^ { 2 } - 72 x y + 16 y ^ { 2 }$
C) $81 x ^ { 2 } - 36 x y + 16 y ^ { 2 }$
D) $81 x ^ { 2 } + 72 x y + 16 y ^ { 2 }$

Question

Quizplus · Accepted Answer

To square the binomial $(9x - 4y)^2$, apply the formula $(a - b)^2 = a^2 - 2ab + b^2$, where $a = 9x$ and $b = 4y$. This results in $81x^2 - 2(9x)(4y) + 16y^2 = 81x^2 - 72xy + 16y^2$.

Perform the Indicated Operation (9x−4y)2( 9 x - 4 y ) ^ { 2 }(9x−4y)2

Perform the Indicated Operation $( 9 x - 4 y ) ^ { 2 }$