Question

Quero a resposta f(x) = 1/2(x-1)²

Answer 1

$f(x) = \frac{1}{2} ( {x - 1)}^{2} \\ = \frac{1}{2} ( {x}^{2} + 2x - 1) \\ = \frac{x {}^{2} }{2} + x - \frac{1}{2} \\ = \frac{ {x}^{2} + 2x - 1 }{2} \\ delta = {2}^{2} - 4.1.( - 1) \\ delta = 4 + 4 \\ delta = 8$