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3. Factor:3 y2 +7y-20Зу?a.b. x- 6ху- 27у*

Question
3. Factor:
3 y2 +7y-20
Зу?
a.
b. x- 6ху- 27у*
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3. Factor: 3 y2 +7y-20 Зу? a. b. x- 6ху- 27у*

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Step 1

First multiply 3 and -20. So -60.

Then we have to factor -60 so that sum of the factors =7

-60= -5 times 12

So we will write 7y=-5y+12y

3y2+7y-20
=3y2-5y+12y-20
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3y2+7y-20 =3y2-5y+12y-20

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Step 2

Then we factor by grouping.

Answer(a): (3y-5)(y+4)

3
Зу'
-5у+12у-20
-У(Зу-5)+4(3у-5)
3(Зу-5)(у+4)
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3 Зу' -5у+12у-20 -У(Зу-5)+4(3у-5) 3(Зу-5)(у+4)

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Step 3

We have to multiply 1 and -27. So -27

Then we factor -27 so that sum of the factor...

x*-бху-27y?
—х?-9ху+3ху-27у?
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x*-бху-27y? —х?-9ху+3ху-27у?

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