Question

Ajutor. Cat mai repede va rog.

Answer 1

g(g(2))=g(a*2+3)=a(a*2+3)+3=2a^2+3a+3
f(f(-2))=f(3*(-2)+a)=f(-6+a)=3(-6+a)+a=4a-18
g(g(2))+f(f(-2))=0
2a^2+3a+3+4a-18=0
2a^2+7a-15=0
delta=b^2-4ac=49+120=169
a1=(-b-radical delta):2a=(-7-13):4=-20:4=-5
a2=(-b+radical delta):2a=(-7+13):4=6:4=3/2