Question

f f(x) = x2 – 2x and g(x) = 6x + 4, for which value of x does (f + g)(x) = 0? –4 –2 2 4

Answer 1

Answer:

x=-2

Step-by-step explanation:

f(x) = x² – 2x and g(x) = 6x + 4

(f + g)(x) = 0

f(x)+g(x)=0

x²-2x+6x+4=0

x²+4x+4=

(x+2)²=0

x+2=0

x=-2