-5x²+10xy²-25xy²
=-5x²-15xy²
=-5x(x+3y²)
(m+n)²-m-n
=(m+n)²-(m+n)
=(m+n)(m+n-1)
a²(a-b)-6ab(b-a)
=a²(a-b)+6ab(a-b)
=a(a-b)(a+6b)
3x的2n次方-15x的2n+1次方
=3x的2n次方(1-5x)
a² b-5ab
=ab(a-5)
6(p+q)²-12(p+q)
=6(p+q)(p+q-2)
-5x²+10xy²-25xy²
=-5x²-15xy²
=-5x(x+3y²)
(m+n)²-m-n
=(m+n)²-(m+n)
=(m+n)(m+n-1)
a²(a-b)-6ab(b-a)
=a²(a-b)+6ab(a-b)
=a(a-b)(a+6b)
3x的2n次方-15x的2n+1次方
=3x的2n次方(1-5x)
a² b-5ab
=ab(a-5)
6(p+q)²-12(p+q)
=6(p+q)(p+q-2)