Question

EQUAÇÃO DO SEGUNDO GRAU -> DESCUBRA AS RAÍZES

a. (x+1) (x-2) =0

b. 10+ x (x -4) =x

c. (x-3) (x+2) = -4​

Answer 1

A. (x+1 (x-2)= 0
x + 1= 0
x - 2= 0
x= -1
x= 2
x 1 = -1, x2 =2

C. (x -3) x (x + 2) = -4
x ᒾ +2x -3x -6 = -4
x ᒾ - x - 6 = -4
x ᒾ - x - 6 + 4 = 0
x ᒾ + x - 2x -2 = 0
X x (x + 1) -2 (x+1) = 0
(x + 1) x (x - 2) = 0
x = - 1
x =2
x1 = -1, x2 = 2