Question

como fazer a conta x²=2x

Answer 1

x^2-2x=0
x(x-2)=0
x'=2
x''=0

Answer 2

x²=2x
x²-2x=0
a=1 b=-2 c=0

∆=b²-4ac
∆=(-2)²-4.1.0
∆=4

x=-b±√∆ /2a

x1=-(-2)+√4 /2.1
x1=2+2 /2
x1=4/2
x1=2

x2=2-2 /2
x2=0