If f(x)=3x^2-7 , find f(4). Show all work

asked Jun 28, 2018 194k views

1 vote

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2 votes

Plug in all x's for 4. 4^2 = 16 --> 16x3=48 --> 48-7 = 41
41 is the final answer

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5 votes

f(x)=3x²-7

Simply insert value of x, 4 into the equation then simplify
f(4)=3(4)²-7
=3(16)-7
= 48 -7
= 41

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