Question

dada a função f(x)=x²+2x+5 determine f(f(-1))

Answer 1

f(x)= x²+2x+5

f(f(x)) = (fx)² +2.fx +5

f(f(x)) = (x²+2x+5)² + 2.(x²+2x+5) + 5

f(f(-1)) = (1-2+5)² + 2.(1-2+5) + 5

f(f(-1)) = 16 + 8 + 5

f(f(-1)) = 29