Love Me Some Composite Functions - Tumblr Posts

fg(x) = (2x+3)^2-5

= (2x+3)(2x+3)-5

= 4x^2+12x+9-5

= 4x^2+12x+4

fg(x) = 4x^2+12x+4

Got bored and decided to do it lols

[asmo is laying on mc's bed while mc does something at their desk]

asmo: what are you doing over there?

mc: math

asmo, humming: what kind?

mc: algebra 2

asmo, looking over at mc and trying to start a conversation: why don't you tell me about it?

mc, tiredly reading the problem: given that f(x) = x² - 5, and g(x) = 2x + 3, what is f(g(x)?

asmo, kind of stunned: