Question

Please answer this ​

Answer 1

Answer:

f(x)+g(x)=0

a, (x²+ax+2)+(x²+2x+a)=0

a, x²+ax+2+x²+2x+a=0

a, 2x²+2x+ax+a=0

a, 2x(x+1)+a(x+1)=0

a, (2x+a)(x+1)=0

so, 2x+a=0

a, 2x=-a

a, x=-a/2

or, x+1=0

a, x=-1

therefore,f(x)+g(x)=(-1)+(-1)

=-1-1=-2

or, f(x)+g(x)=(-a/2)+(-a/2)

=-2a/2=-a