Question

identifique as equações do 2 grau x²+13x+36=0

Answer 1

x²+13x+36=0
y = 13^2 -4.1.36
y = 169 - 144
y = 25

x' = -13-5 / 2
x' = -18/2 = -9

x" = -13+5 / 2
x" = -8/2 = -4

Answer 2

Olá, boa noite ☺

Resolução:

x² + 13 + 36 = 0

a=1
b=13
c= 36

$\Delta = b^{2} -4.a.c \\ \Delta=13^{2}-4.1.36 \\ \Delta= 169-144 \\ \Delta= 25$

Agora vamos calcular o valor de x, que terá 2 valores.

$x= \frac{-b\pm \sqrt{\Delta} }{2.a} \\ \\ x= \frac{-13\pm \sqrt{25} }{2.1} \\ \\ x= \frac{-13\pm5}{2} \\ \\ x'= \frac{-13+5}{2} = \frac{-8}{2} =-4 \\ \\ x''= \frac{-13-5}{2} = \frac{-18}{2}=-9$

Bons estudos :)