Question

-x²-5x-6=0 (Bháskara)

Answer 1

Olá, boa noite ☺

Resolução:

-x²-5x - 6 = 0

a= -1
b= -5
c= -6

$\Delta= b^{2}-4.a.c \\ \Delta= (-5)^{2} -4.(-1).(-6) \\ \Delta= 25 +4.(-6) \\ \Delta= 25 - 24 \\ \Delta=1$

Valores de x.

$x= \frac{-b\pm \sqrt{\Delta} }{2.a} \\ \\ x= \frac{-(-5)\pm \sqrt{1} }{2.(-1)} \\ \\ x= \frac{5\pm1}{-2} \\ \\ x'= \frac{5+1}{-2} = \frac{6}{-2} =-3 \\ \\ x'' = \frac{5-1}{-2} = \frac{4}{-2} =-2$

Bons estudos :)