Question

Sendo f(x)= x²-2x+3 obtenha f(2+R)

Me ajudem!!

Answer 1

F(X) = X² -2x + 3
F(2 + R) = (2 + R)² -2(2 + R) + 3
F(2 + R) = 2² + 2.(2.R) + R² -2.2 -2.R + 3
F(2 +R) = 4 + 4R + R² -4 -2R + 3
F(2 +R) = R² + 2R + 3