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Kobotan [32]
3 years ago
12

36x^2-21x-30 factor

Mathematics
1 answer:
miv72 [106K]3 years ago
8 0
Easy...

to even begin to factor..you must factor out a 3, to simplify your answer.

3(12x^{2}-7x-10)

Now, you can factor.

3(12 x^{2} -7x-10)

So..to find the answer...

12*-10=-120x
and 
you would use -7x

What multiplies to -120..but adds to -7?

-15*8=-120
and
-15+8=-7

To find the answer, plug in what you know..

3(3x+2)(4x-5)

Thus, your answer.
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__________________________________________________________

<u>Summary</u>

  <u>Substitution</u>

Changing or replacing from a term to another terms/expression is called substitution.

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__________________________________________________________

If you have any doubts regarding my answer/explanation, do not hesitate to ask in comment!

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