Multiply.
-$( 3 x + 0.5 ) ( 3 x - 0.5 )$
A) $9 x ^ { 2 } - 2.5$
B) $9 x ^ { 2 } - 1$
C) $9 x ^ { 2 } - 0.25$
D) $9 x ^ { 2 } - 3 x - 0.25$

Name: Multiply. -$( 3 x + 0.5 ) ( 3 x - 0.5 )$ A) $9 x ^ { 2 } - 2.5$ B) $9 x ^ { 2 } - 1$ C) $9 x ^ { 2 } - 0.25$ D) $9 x ^ { 2 } - 3 x - 0.25$
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Question

Quizplus · Accepted Answer

The expression is a difference of squares: $(a+b)(a-b) = a^2 - b^2$. Here, $a = 3x$ and $b = 0.5$, so the result is $(3x)^2 - (0.5)^2 = 9x^2 - 0.25$.

Multiply - (3x+0.5)(3x−0.5)( 3 x + 0.5 ) ( 3 x - 0.5 )(3x+0.5)(3x−0.5)

Multiply
- $( 3 x + 0.5 ) ( 3 x - 0.5 )$