Multiply.
-$( 7 a - 2 ) ^ { 2 }$
A) $7 a ^ { 2 } + 4$
B) $7 a ^ { 2 } - 28 a + 4$
C) $49 a ^ { 2 } + 4$
D) $49 a ^ { 2 } - 28 a + 4$

Name: Multiply. -$( 7 a - 2 ) ^ { 2 }$ A) $7 a ^ { 2 } + 4$ B) $7 a ^ { 2 } - 28 a + 4$ C) $49 a ^ { 2 } + 4$ D) $49 a ^ { 2 } - 28 a + 4$
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Question

Quizplus · Accepted Answer

To multiply $(7a - 2)^2$, we use the formula $(a - b)^2 = a^2 - 2ab + b^2$. Applying this, we get $49a^2 - 2*7a*2 + 4 = 49a^2 - 28a + 4$.

Multiply - (7a−2)2( 7 a - 2 ) ^ { 2 }(7a−2)2

Multiply
- $( 7 a - 2 ) ^ { 2 }$