Question

(x+2)x(x-6)=0 operaçao do 2 grau

Answer 1

x^2 -6x +2x -12 =0

x^2 -4x -12 =0

D= (-4)^2 -4.1.-12

D= 16 +48

D= 64

x1= -(-4)+8 = 12/2 = 6

2.1

x2= -(-4)-8 = -4/2 = -2

2.1

S={-2, 6}