akar-akar persamaan x²-2x-5 = 0 adalah... tolong pake cara

x1 + x2 = 2
x1x2 = -5

x1= 2-x2
x1(2-x2)=-5
2x1 - x1x2 = -5
2x1-(-5)=-5
2x1=-5-5
2x1=-10
x1=-5

-5+x2=2
x2=7

akar2nya -5 Dan 7