Factor by grouping.
-$$x ^ { 2 } - 3 x - 3 x + 9$$
A) $( x - 3 ) ( x - 3 )$
B) $( x - 3 ) ( x + 6 )$
C) $( x + 3 ) ( x - 3 )$
D) $- 6 x \left( x ^ { 2 } + 9 \right)$

Name: Factor by grouping. -\[x ^ { 2 } - 3 x - 3 x + 9\] A) $( x - 3 ) ( x - 3 )$ B) $( x - 3 ) ( x + 6 )$ C) $( x + 3 ) ( x - 3 )$ D) $- 6 x \left( x ^ { 2 } + 9 \right)$
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Question

Quizplus · Accepted Answer

The expression can be grouped as $(x^2 - 3x) - (3x - 9)$, then factored as $x(x - 3) - 3(x - 3)$, which simplifies to $(x - 3)(x - 3)$ or $(x - 3)^2$.

Factor by Grouping x2−3x−3x+9x ^ { 2 } - 3 x - 3 x + 9x2−3x−3x+9

Factor by Grouping $x ^ { 2 } - 3 x - 3 x + 9$