2x²-11x+5=0怎么解,还有x²-40x+400=0过程

2x²-11x+5=0怎么解,还有x²-40x+400=0过程
2x²-11x+5=0怎么解,
还有x²-40x+400=0过程

2x²-11x+5=0怎么解,还有x²-40x+400=0过程
2x²-11x+5=0
(2x-1)(x-5)=0,
(2x-1)=0,(x-5)=0
x1=1/2,x2=5
x²-40x+400=0
(x-20)²=0,
x1=x2=20