(x^2+9y^2)^2-36x^2*y^2
=(x^2+9y^2)^2-(6xy)^2
=[(x^2+9y^2)+(6xy)][(x^2+9y^2)-6xy]
=[x^2+6xy+9y^2][x^2-6xy+9y^2]
=(x+3y)^2(x-3y)^2
如果满意记得采纳哦!你的好评是我前进的动力.(*^__^*) 嘻嘻……
(x^2+9y^2)^2-36x^2*y^2
=(x^2+9y^2)^2-(6xy)^2
=[(x^2+9y^2)+(6xy)][(x^2+9y^2)-6xy]
=[x^2+6xy+9y^2][x^2-6xy+9y^2]
=(x+3y)^2(x-3y)^2
如果满意记得采纳哦!你的好评是我前进的动力.(*^__^*) 嘻嘻……