Question

The function g is defined by
g(x)=2x^2-4 Find g(5x).

Answer 1

replace the x in the expression for g(x) by 5x and simplify.

Answer 2

2(5x)^2-4 = 100-4?

Answer 3

the left side of your answer is correct but where as the 'x' gone?

Answer 4

5x = 2(5x)^2 - 4

Answer 5

g(5x) = 2(5x)^2 - 4

Answer 6

how would you solve this?

Answer 7

now simplify

Answer 8

g(5x)=100-4 = g(5x)=96 ?

Answer 9

No
g)5x) = 2* 25x^2 - 4 = 50x^2 - 4

we are not solving an equation for x
Just simplifying 2(5x)^2 - 4

Answer 10

So that would be the final answer? g(5x)=2(5x)^2-4 ?

Answer 11

no see my last post
50x^2 - 4 is the final answer

Answer 12

So you wouldnt do the 50x^2? you would just leave it like that?

Answer 13

You must keep the function name, g(x).

Write out g(x).

Wherever you see 'x,' write '5x' instead.

Answer 14

Write out g(x).
Next, replace every 'x' in this function with '5x.' Keep the label 'g.' The new function is then g(5x). Write it out.