Question

(mack_sp)se f(x-1)=x2; então o valor de f(2)è

Answer 1

2 (x - 1) = x² 
2x - 2 = x²
2x - x² = 2
x - x² = 2/2
- x² + x = 1 (-1)
x² + x = -1
x² + x + 1 = 0