Question

-x² +x +12=0 resposta dessa equação

Answer 1

-x² +x +12= Naah

use a Delta =Δ =b² -4ac

fórmula de Baskhara= - b+-√Δ/2a

Δ= 1²-4(-1) 12)

Δ= 1 +48

Δ=49

X = -1+-√49/2.-1

X= -1+-7/-2

X= -1+7/ -2

X==6/-2

X= -3

X= -1 -7/-2

X= -8/-2 -x-=+

X= +4

Answer 2

Olá, boa noite!!

$- {x}^{2} + x + 12 = 0 \: \: ^{ \times ( - 1)} \\ {x}^{2} - x - 12 = 0\\ \\ a = 1 ,\: b = - 1 ,\: c = - 12 \\ \\ d = b ^{2} - 4ac \\ d = {( - 1)}^{2} - 4 \times 1 \times ( - 12) \\ d = 1 + 48 \\ d = 49 \\ \sqrt{d} = 7 \\ \\ x1 = \frac{ - b + \sqrt{d} }{2a} = \frac{1 + 7}{2 \times 1} = \frac{8}{2} = 4 \\ \\ x2 = \frac{ - b - \sqrt{d} }{2a} = \frac{1 - 7}{2 \times 1} = \frac{ - 6}{2} = - 3 \\ \\ S = (4; - 3)$

Espero ter ajudado!
Bons estudos! ♡