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If f (x)= 2x^2-7 find f (4)
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4 votes
If f (x)= 2x^2-7 find f (4)

User VBB
by
4.1k points

2 Answers

4 votes

Answer:

14

Explanation:

f(x)=2x+7

f(4)=2(4)+7

=8+7

=15

f(-4)=2(-4)+7

=-8+7

=-1

f(4)+f(-4)

=15+(-1)

=14.

User Ganeshragav
by
4.1k points
1 vote

Answer:

25

Explanation:

f (x)= 2x^2-7

Let x=4

f (4) = 2 ( 4)^2 -7

Exponents first

f(4) =2*16 -7

Multiply

f(4) =32 -7

Subtract

f(4) =25

User Jephte
by
4.2k points
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