Maria H.

asked • 06/28/19

How to simplify 3x^2 + 6x – 24. Please, step by step solving, so I can understand it. Thank you!

2 Answers By Expert Tutors

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Mark H. answered • 06/28/19

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Maria H.

I have another question. So one of the answers was the one that you came up with, however, there was another one that said 3(x - 4)(x + 2) I am wondering what the difference is
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06/28/19

Maria H.

Also, I still don't understand the third step, "Next, find the factors...." Could you explain it more if you can?
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06/28/19

Mark H.

It sounds like you need a review of the basics of factoring. Are you OK with concept when it comes to constants? e.g. the possible factor pairs for 12 are 1*12, 2*6, and 3*4. Also, the negative of each one--eg -1*-12 Expressions with unknowns have factors also. A simple example is x^2 -2 x This factors to x * (x + 2) Look at my solution for the factors of x^2 + 2x - 8. I got (x + 4) and (x - 2). Multiply these together to see that you get the expression I started with. To answer your other question: (x - 4)*(x + 2) = x^2 - 2x - 8 NOT the same thing, right? If this is all going over your head, you may want to sign up with a tutor.
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06/28/19

Maria H.

Thank you!
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07/02/19

Don L. answered • 06/28/19

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5 (12)

Fifteen years teaching and tutoring basic math skills and algebra

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