因式分解1:2an-50a^3n 2:4x(y-x)-y^2
问题描述:
因式分解1:2an-50a^3n 2:4x(y-x)-y^2
答
2an-50a^3n
=2an(1-25a^2)
=2an(1-5a)(1+5a)
4x(y-x)-y^2
=4xy-4x^2-y^2
=-(4x^2+y^2-4xy)
=-(2x-y)^2