x²-300x+20000=0怎么解方程?
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x²-300x+20000=0怎么解方程?
x²-300x+20000=0怎么解方程?
x²-300x+20000=0怎么解方程?
x²-300x+20000=0
(x-100)(x-200)=0
x=100或x=200
x²-300x+20000=0
(x-100)(x-200)=0
x1=100, x2=200
x^2-300x+20000=0
x^2-300x+22500=2500
(x-150)^2=2500
x=200 x=100