Question

F(x)= x2 + 2 dan g(x)= 2x + 5. Jika f(x)= g(x), berapa nilai x?
kalo g bantu jg gpp...

Answer 1

F(x) = g(x)
x² +  2 = 2x + 5
x² - 2x + 2 - 5 = 0
x² - 2x - 3 = 0
(x -3)(x+1)= 0
x = 3 atau x = -1