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23-02-2017
Mathematics

contestada

what are the answers to these three questions? horrible at math. ty.

what are the answers to these three questions horrible at math ty class=

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Аноним Аноним

23-02-2017

3x^2 + 2x - 6 if x = -2

=3(-2)^2 + 2(-2) - 6
=12 - 4 - 6
= 2

5x^2 + 6x - 2 if x = -2

=5(-2)^2 + 6(-2) - 2
=20 - 12 - 2
= 6

-2x^3 + 2x^2 if x = 2

= -2(2)^3 + 2(2)^2
= -16 + 8
= -8

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