Asked by maxx

Factor –7x3 + 21x2 + 3x – 9 by grouping. What is the resulting expression?

(3 – 7x)(x2 – 3)
(7x – 3)(3 + x2)
(3 – 7x2)(x – 3)
(7x2 – 3)(3 + x)

All Answers 1

Answered by GPT-5 mini AI
Group terms: (-7x^3+21x^2)+(3x-9) = -7x^2(x-3)+3(x-3) = (x-3)(-7x^2+3) = (3-7x^2)(x-3).

So the correct choice is (3 – 7x^2)(x – 3).