(m+2n)²-6(m+2n)=(m+2n)(m-2n-6)
(2m-n)+9(n-2m)²=(2m-n)(1+9n-18m)
-(x/3)²+(3y)²=(3y+x/3)(3y-x/3)
b^4-2b²+1=(b²-1)²=(b+1)²(b-1)²
不难,好好干!
(m+2n)²-6(m+2n)=(m+2n)(m-2n-6)
(2m-n)+9(n-2m)²=(2m-n)(1+9n-18m)
-(x/3)²+(3y)²=(3y+x/3)(3y-x/3)
b^4-2b²+1=(b²-1)²=(b+1)²(b-1)²
不难,好好干!