Multiply by using the special case products. $$( 2 r + 2 ) ( 2 r - 2 )$$
A) $4 r ^ { 2 } - 4$
B) $4 r ^ { 2 } + 8 x + 4$
C) $4 r ^ { 2 } + 4$
D) $4 r ^ { 2 } - 8 x + 4$

Name: Multiply by using the special case products. \[( 2 r + 2 ) ( 2 r - 2 )\] A) $4 r ^ { 2 } - 4$ B) $4 r ^ { 2 } + 8 x + 4$ C) $4 r ^ { 2 } + 4$ D) $4 r ^ { 2 } - 8 x + 4$
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Question

Quizplus · Accepted Answer

This is an example of the difference of squares formula, $a^2 - b^2 = (a + b)(a - b)$, where $a = 2r$ and $b = 2$, resulting in $4r^2 - 4$.

Multiply by Using the Special Case Products (2r+2)(2r−2)( 2 r + 2 ) ( 2 r - 2 )(2r+2)(2r−2)

Multiply by Using the Special Case Products $( 2 r + 2 ) ( 2 r - 2 )$