If $f (x) = 2 x + 3 x + 5$ $f(x)=2x+3x+5$ , how do you find 3f(-2)?

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Answer 1 · 2015-05-25T13:34:53

3f(-2) would be -15

First get f(-2) by plugging x= -2, f(-2)= 2(-2) + 3(-2) +5 = -4-6 +5= -5. Thus 3f(-2)= -15.

If f(x)=2x+3x+5f(x)=2x+3x+5, how do you find 3f(-2)?