SOLUTION: Factor the expression by grouping. I need help with this one please. 24q^7-42q^4r+36q^3r^2-63r^3

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Question 308272: Factor the expression by grouping. I need help with this one please.
24q^7-42q^4r+36q^3r^2-63r^3
Answer by mananth(16946)   (Show Source): You can put this solution on YOUR website!
24q^7-42q^4r+36q^3r^2-63r^3
6q^4(4q^3-7r)+9r^2(4q^3-7r)
(4q^3-7r)(6q^4+9r^2)
3(4q^3-7r)(2q^4+3r^2)
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