用因式分解法解2m(m+2)=m+2,4(y-3)^2-2(y-3)=0,x^2-10x-75=0,x^2-x-6=0

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用因式分解法解2m(m+2)=m+2,4(y-3)^2-2(y-3)=0,x^2-10x-75=0,x^2-x-6=0用因式分解法解2m(m+2)=m+2,4(y-3)^2-2(y-3)=0,x^2-

用因式分解法解2m(m+2)=m+2,4(y-3)^2-2(y-3)=0,x^2-10x-75=0,x^2-x-6=0
用因式分解法解2m(m+2)=m+2,4(y-3)^2-2(y-3)=0,x^2-10x-75=0,x^2-x-6=0

用因式分解法解2m(m+2)=m+2,4(y-3)^2-2(y-3)=0,x^2-10x-75=0,x^2-x-6=0
2m(m+2)=m+2
2m(m+2)-(m+2)=0
(2m-1)(m+2)=0
所以2m-1=0 m=1/2
或者m+2=0 m=﹣2
4(y-3)^2-2(y-3)=0
2(y-3)[2(y-3)-1]=0
2(y-3)(2y-7)=0
所以y-3=0 y=3
或者2y-7=0 y=7/2
x^2-10x-75=0
(x-15)(x+5)=0
所以x-15=0 x=15
或者x+5=0 x=﹣5
x^2-x-6=0
(x-3)(x+2)=0
所以x-3=0 x=3
或者x+2=0 x=﹣2