Multiply.
-$$( 9 x - 7 ) ^ { 2 }$$
A) $81 x ^ { 2 } + 49$
B) $9 x ^ { 2 } - 126 x + 49$
C) $9 x ^ { 2 } + 49$
D) $81 x ^ { 2 } - 126 x + 49$

Name: Multiply. -\[( 9 x - 7 ) ^ { 2 }\] A) $81 x ^ { 2 } + 49$ B) $9 x ^ { 2 } - 126 x + 49$ C) $9 x ^ { 2 } + 49$ D) $81 x ^ { 2 } - 126 x + 49$
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Question

Quizplus · Accepted Answer

To square the binomial $(9x - 7)^2$, apply the formula $(a - b)^2 = a^2 - 2ab + b^2$, where $a = 9x$ and $b = 7$. This results in $81x^2 - 2(9x)(7) + 49$, which simplifies to $81x^2 - 126x + 49$.

Multiply - (9x−7)2( 9 x - 7 ) ^ { 2 }(9x−7)2

Multiply
- $( 9 x - 7 ) ^ { 2 }$