(1.) 6a(a+b)-4b(b+a)
=(a+b)(6a-4b)
=2(a+b)(3a-2b)
(2) (m-n) ³ +2n(n-m) ²
=(m-n) ²(m-n+2n)
=(m-n) ²(m+n)
(3) m²(a-2)+m(2-a)
=(a-2)(m²-m)
=m(a-2)(m-1)
(4) a(x-y)-b(y-x) ²
=(x-y)[a+b(x-y)]
=(x-y)(a+bx-by)
(1.) 6a(a+b)-4b(b+a)
=(a+b)(6a-4b)
=2(a+b)(3a-2b)
(2) (m-n) ³ +2n(n-m) ²
=(m-n) ²(m-n+2n)
=(m-n) ²(m+n)
(3) m²(a-2)+m(2-a)
=(a-2)(m²-m)
=m(a-2)(m-1)
(4) a(x-y)-b(y-x) ²
=(x-y)[a+b(x-y)]
=(x-y)(a+bx-by)