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GrogVix [38]
3 years ago
13

Can someone give examples of multiplying Factors here is one (-x-4)(x+4)

Mathematics
1 answer:
erastova [34]3 years ago
3 0
You use FOIL

First
Outer
Inner
Last

(-x - 4)(x + 4)

The first terms for both are -x and x

-x * x = -x^2

Outer are -x and 4

-x * 4 = -4x

Inner are -4 and x

-4 * x = -4x

Last are -4 and 4

-4 * 4 = -16

Combine:

-x^2 - 4x - 4x - 16

-x^2 - 8x - 16

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8 0
3 years ago
HELP ASAP!!
garri49 [273]
I'm pretty sure it would be <span>x - y + 1 = 0 because if you plug in one of the coordinates into each equation, this is the only one that works.

</span><span>y - x + 1 = 0
2 - 1 + 1 = 0
2 = 0 not correct

</span><span>x - y + 1 = 0
1 - 2 + 1 = 0
0 = 0 correct

</span><span>-x - y + 1 = 0
-1 - 2 + 1 = 0
-2 = 0 not correct
</span>
4 0
3 years ago
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