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Mathematics 16 Online
OpenStudy (anonymous):

If F(x) = 5x - 3 and G(x) = x2 + 3, what is G(F(x)?

OpenStudy (anonymous):

do you mean x^2 + 3?

OpenStudy (anonymous):

yes my bad

OpenStudy (anonymous):

insert F(x) into G(x) and multiple \[(5x-3)^2+3\] I am assuming that the x2 is x^2

OpenStudy (anonymous):

A. 25x2 - 30x + 12 B. 25x2 + 12 C. 5x3 - 9 D. 5x3 + 15x - 9

OpenStudy (anonymous):

which on do you think

OpenStudy (anonymous):

C

OpenStudy (anonymous):

try foil on the (5x-3)^2 first

OpenStudy (anonymous):

\[(5x-3)(5x-3)\] is what?

OpenStudy (anonymous):

(25x-3) right

OpenStudy (anonymous):

No 5x*5x is 25x^2

OpenStudy (anonymous):

then you mutilply 5x*-3 and you get

OpenStudy (anonymous):

Oh I see

OpenStudy (anonymous):

you got it

OpenStudy (anonymous):

yeah I kinda get it.

OpenStudy (anonymous):

just remember the foil technique mutily the first to term of each |dw:1397355735828:dw|

OpenStudy (anonymous):

and then collect like terms and you got it

OpenStudy (anonymous):

it was A

OpenStudy (anonymous):

you got it !!!

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