Mathematics
Grade10
Easy
Question
Factors -3x3 + 18x2 – 27x
- 3x (x + 3)2
- -3x (x – 3)2
- (3x – 9)2
- (3x + 9)2
The correct answer is: -3x (x – 3)2
Take out -3x,
-3x (x2 – 6x + 9) = -3x (x2 – 2(x)(3) + 32) = -3x (x – 3)2
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