Question

x(x-2)=2(x+6) me ajudem !!! tem essa outra x(2x-1)+6=4(x+1)

Answer 1

x²-2x=2x+12
x²-4x=12
x²-4x-12 = 0
Delta = b²-4ac
Delta = 16 -4(1)(-12)
Delta = 16+48
Delta = 64
x= -b +- (raiz de delta)/2a
x= 4 +- 8/2
x¹ = 4+8 /2 = 6
x² = 4-8 /2 = -2