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Vinil7 [7]
2 years ago
9

How do you do this?

Mathematics
2 answers:
IgorC [24]2 years ago
6 0
So the trickiest part about these is finding how to get the middle term. The easiest way to do this is by multiplying your end terms, 3 and -8, and using the factors to find how to get the middle term:

3 x -8 = -24
Factors of 24 = 1,2,3,4,6,8,12,24

Now we need two of these factors to add to make +10, in this case it'd be 2 and 12. The reason this works is because our number is -24, so one of the factors is going to be negative, in this case we make the 2 negative: -2+12=10

Now we set up the equation like so:

3x^2 + 12x -2x - 8

Now simplify by pulling out common terms:

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

Ta-da, your polynomial is now 2 binomials

It takes lots of practice, but once you get the hang of it they get easier to do in your head. Keep at it!
Sholpan [36]2 years ago
4 0

put the first equation in the graphic calculator in y= #1  then in y=#2 put one of the answer choices, if the y1 & y2 match that will be your answer


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