Question

encontre as raízes das funções abaixo e faça o esboço do gráfico no plano cartesiano: f(x) = - x² – x + 6

Answer 1

Resposta:

$-1x^2-1x+6=0\\a = -1\\b = -1\\c = 6\\\\Formula = \frac{-b\sqrt{b^2-4ac} }{2a}\\\\x = \frac{-(-1)+-\sqrt{(1)}~2-4.(-1).(6) }{2.(-1)}\\\\x= \frac{1\sqrt{1-(-24)} }{-2} \\\\x= \frac{1+-\sqrt{25} }{-2} \\\\x'= \frac{1+5}{-2} = -3\\\\x'' = -\frac{4}{-2} = 2\\\\S= {(-3, 2)}$