Question

b) (x - 1). (x - 2) = (x - 1) (2x + 3)​

Answer 1

Resposta:

x²-2x-1+2 = 2x²+3x -2x-3

x²-2x² = 3x -4

x²=-3x+4

x²+3x-4=0

Δ=9+16=25

x1= (-3+5)/2 =1

x2=(-3-5)/2= -4

x=1 e/ou x=-4