What is the value of 2 + 5x – x2 when x = –2 ?

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16-02-2019
Mathematics

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What is the value of 2 + 5x – x2 when x = –2 ?

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CassidyHarper CassidyHarper · Answer 1 · 2019-02-16T14:22:57+01:00

CassidyHarper CassidyHarper

16-02-2019

-12.

Just sub in - 2 for x. So the equation will look like 2 + 5(-2) - (-2)². First multiply (-2)², which is 4, and then do 5(-2) which is -10. Do -10 - 4 to get -14. Add 2 to that and you get -12.

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