因式分解法解方程.2x^2+5x=0 (y-1)(y+3)=-4 x(x-2)=4-x^2 √3x(x-1)-√2(x-
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2x^2+5x=0

x(2x+5)=0

x=0或x=-5/2

(y-1)(y+3)=-4

y²+2y+1=0

y=-1

x(x-2)=4-x^2

x²-2x=4-x²

2x²-2x-4=0

x²-x-2=0

(x+1)(x-2)=0

x=-1,x=2

√3x(x-1)-√2(x-1)=0

(x-1)(√3x-√2)=0

x=1,x=√2/√3

4(x-1)^2=25(x+1)^2

2x-2=5x+5

3x=-7

x=-7/3

2x-2=-5x-5

7x=-3

x=-3/7

√2x(x+1)=x+1

(x+1)(√2x-1)=0

x=-1,x=√2/2

x^2-9=1/2(x^2-6x+9)

2(x-3)(x+3)=(x-3)²

x-3=0

x=3

2(x+3)=x-3

2x+6=x-3

x=-9

(2x-1)^2-8(2x-1)(x-2)+16(x-2)^2=0

(2x-1-4(x-2))²=0

(-2x+7)²=0

x=7/2