Question

Dada a função f(x)= 7- x² - 6x

Use a formula de bhaskara

Answer 1

7 - x² - 6x = 0

- x² - 6x + 7 = 0 ( - 1 )

x² + 6x - 7 = 0

x = - 3 + - √9 + 7

x = - 3 + - √16

x' = - 3 + 4  →  x' = 1

x" = - 3 - 4  →  x" = - 4