Question

F(x) = - x ^ 2 - 8x - 7 alguém me ajuda com o delta e o vértice​

Answer 1

Resposta:

Claro, ajudo sim.

$x^{2} - 8x - 7\\\\\\Δ = b^{2} - 4 . a . c\\ Δ = 64 - 4 . -1 . -7\\Δ = 64 - 28\\\\Δ = 36\\\\\frac{+8 +- \sqrt{36} }{2.-1} = \frac{8 +- 6}{-2}\\\\\frac{8 + 6}{-2} = \frac{14}{-2} = -7\\\\\frac{8 - 6}{-2} = \frac{2}{-2} = -1$