化简求值:(3x^2-2y^2)(-2y^2-3x^2)+3(x^2-y^2)(x^2+y^2) X是2,Y是3. TH
收藏:
0
点赞数:
0
评论数:
0
1个回答

(3x^2-2y^2)(-2y^2-3x^2)+3(x^2-y^2)(x^2+y^2)

=4y^4-9x^4+3(x^4-y^4)

=4y^4-9x^4+3x^4-3y^4

=y^4-6x^4

X是2,Y是3.

=y^4-6x^4

=3^4-6*2^4

=81-6*16

=81-96

=-15

点赞数:
0
评论数:
0
关注公众号
一起学习,一起涨知识