Question

一道初二因式分解

5ax^2+6x^2ab-20a^2y^2-24aby^2

Answer 1

=5ax^2-20【a】y^2+6x^2ab-24aby^2
=6ab(x^2-4y^2)+5a(x^2-4y^2)
=a(6b-5)(x-2y)(x+2y)
【a】应该没有平方

Answer 2

5ax^2+6x^2ab-20a^2y^2-24aby^2这题 你可能有个少写平方 或者有个多些了