4(x²+y)(x²-y)-(2x²-y)²
=4(x⁴-y²)-(4x⁴-4x²y+y²)
=4x⁴-4y²-4x⁴+4x²y-y²
=4x²y-5y²
=4*2²*(-5)-5*(-5)²
=-205
如果不懂，请追问，祝学习愉快！
4(x²+y)(x²-y)-(2x²-y)²
=4(x⁴-y²)-(4x⁴-4x²y+y²)
=4x⁴-4y²-4x⁴+4x²y-y²
=4x²y-5y²
=4*2²*(-5)-5*(-5)²
=-205
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024