If f(x)= -2X^2 + 5X + C and f(-2)= -15 what is the value of C?

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04-03-2017
Mathematics

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If f(x)= -2X^2 + 5X + C and f(-2)= -15 what is the value of C?

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trombonebookworm trombonebookworm · Answer 1 · 2017-03-04T02:06:10+01:00

trombonebookworm trombonebookworm

04-03-2017

In the second function, the x is replaced by -2. So, in order to solve this, you would substitute in -2 into the first equation and solve for c.

-15=-2(-2)(-2)+5(-2)+c
-15=-18+c
3=c

The value of c is 3

Hope this helped!

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