Question

f(x)=2x=2 and g(x)=x^2-1 find in simplest form
f(-2) g(k+1)

Answer 1

I just want to make sure that you meant \(\large f(x) = 2x\color{red}{+}2\). :-)

Answer 2

yeah sorry

Answer 3

Note that if \(\large f(x)=2x+2\), then \(\large f(-2) = 2(-2)+2 = \ldots \). Can you take things from here?

Note that if \(\large g(x) = x^2-1\), then \(g(k+1) = (k+1)^2-1 = (k+1)(k+1)-1\). All you need to do now to finish this part is FOIL out the product there and simplify. Can you take things from here?

I hope this makes sense! :-)

Answer 4

okay I understand! Thankyou!