Question

PLEASW HELP FAST! Giving may points away, and brainlist
For f(x)=4x+1 and g(x)=x^2-5 fins (f o g)(x)
A.)4x^3+x^2-5x-5
B.)4x^2-19
C.)4x^3+x^2-4x-6
D.)4x^3+x^2-20x-5

Answer 1

4x² - 19 → B

substitute x = g(x) into f(x)

f(g(x)) = f(x² - 5) = 4(x² - 5 ) + 1 = 4x² - 20 + 1 = 4x² - 19