Question

determine f(x)= 3x elevado a 2 -24x-99

Answer 1

f(x)= 3x² - 24x - 99

Tira o Δ

Δ = 24² - 4. 3. 99

Δ = 576 + 1188

Δ = 1764

x' = $\frac{24+\sqrt[]{1764} }{2.3} = \frac{24+42}{6} = \frac{66}{6} = 11$

x'' = $\frac{24-\sqrt[]{1764} }{2.3} = \frac{24-42}{6} = \frac{-18}{6} = -3$