x²-5x+3=0 求x
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x²-5x+3=0求xx²-5x+3=0求xx²-5x+3=0求xx²-5x+3=0x²-5x+2.5²=-3+2.5²(x-2.
x²-5x+3=0 求x
x²-5x+3=0 求x
x²-5x+3=0 求x
x²-5x+3=0
x²-5x+2.5²=-3+2.5²
(x-2.5)² =3.25
x-2.5=+-√13/2
x1=+√13/2+2.5
x2=-√13/2+2.5