Question

f(x) = 4x2 + 5
Find the value of f(x) when x=2.

Answer 1

is that 4x^2?

Answer 2

you have to substitute the value 2 in x of the function of 4x^2 +5 :)

Answer 3

f(x=2) = 4(2)^2 + 5 :)

Answer 4

Yes it is sorry, typo.

Answer 5

so then 4*2^2+5= 69

Answer 6

check it again i got a different answer :)

Answer 7

4*2=8*8=64+5=69

Answer 8

I still have the same answer.

Answer 9

\[4x^2 +5 = 4(2)^2 +5 = 4(4) +5 = 16 + 5 = 21\]

Answer 10

Oh okay thank you. So would 21 be my answer?

Answer 11

yes, no problem :D