algebra 2 help?

0 ⤊

Solve each equation over the set of complex numbers.

If f(x)=3x+5 and g(x)=x-1, find f[g(-1)].

I don't understand how to do this problem.

2007-12-05 10:55:03 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

f(g(-1) ) = f( -1-1) = 3(-2) + 5 = -1

2007-12-09 11:02:02 · answer #1 · answered by robert 6 · 0⤊ 0⤋

fist sub -1 in g
g(-1)=(-1)-1 = -2
sub -2 in f
f(-2)=3(-2)+5 = -1

2007-12-05 11:02:57 · answer #2 · answered by norman 7 · 0⤊ 0⤋