Question

g(x) = 5x2 - 4x
h(x) = 3x + 9
Find: g(h(x))

Answer 1

\[45^2+15x+45\]

Answer 2

which can be simplified into:
\[15(3x^x+x+3)\]

Answer 3

g(h(x)) = 5(3x+9)^2 -4(3x+9)
= 5( 9x^2 + 54x +81) - 12x -36
= 45x^2 + 270x + 405 -12x -36
= 45x^2 + 234x + 269

Answer 4

^ he's right...

Answer 5

I'm being really stupid today... '-.-

Answer 6

sorry it 369 instead of 269

Answer 7

thanks both of you

Answer 8

45x^2 + 234x + 369

Answer 9

my pleasure XD