问题
解答题
因式分①m2a-4ma+4a ②x2(x-y)+(y-x)
答案
①m2a-4ma+4a
=a(m2-4m+4)
=a(m-2)2;
②x2(x-y)+(y-x)
=(x-y)(x2-1)
=(x-y)(x+1)(x-1).
因式分①m2a-4ma+4a ②x2(x-y)+(y-x)
①m2a-4ma+4a
=a(m2-4m+4)
=a(m-2)2;
②x2(x-y)+(y-x)
=(x-y)(x2-1)
=(x-y)(x+1)(x-1).