Multiply.
-$$( 9 x + 1 ) ^ { 2 }$$
A) $9 x ^ { 2 } + 1$
B) $81 x ^ { 2 } + 1$
C) $9 x ^ { 2 } + 18 x + 1$
D) $81 x ^ { 2 } + 18 x + 1$

Name: Multiply. -\[( 9 x + 1 ) ^ { 2 }\] A) $9 x ^ { 2 } + 1$ B) $81 x ^ { 2 } + 1$ C) $9 x ^ { 2 } + 18 x + 1$ D) $81 x ^ { 2 } + 18 x + 1$
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Question

Quizplus · Accepted Answer

To multiply $(9x + 1)^2$, use the formula $(a + b)^2 = a^2 + 2ab + b^2$. Here, $a = 9x$ and $b = 1$, so it becomes $81x^2 + 18x + 1$.

Multiply - (9x+1)2( 9 x + 1 ) ^ { 2 }(9x+1)2

Multiply
- $( 9 x + 1 ) ^ { 2 }$