若m(2x-y^2)=y^4-4x^2,那么代数式m应为( ) A.-2x-y^2 B.-y^2+2x C.2x+y^2 D.2x-y^2

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/16 01:54:05

若m(2x-y^2)=y^4-4x^2,那么代数式m应为( ) A.-2x-y^2 B.-y^2+2x C.2x+y^2 D.2x-y^2
若m(2x-y^2)=y^4-4x^2,那么代数式m应为( ) A.-2x-y^2 B.-y^2+2x C.2x+y^2 D.2x-y^2

若m(2x-y^2)=y^4-4x^2,那么代数式m应为( ) A.-2x-y^2 B.-y^2+2x C.2x+y^2 D.2x-y^2
A.-2x-y^2
m(2x-y^2)=y^4-4x^2
m(2x-y^2)=(y^2-2x)(y^2+2x)
-m(y^2-2x)=(y^2-2x)(y^2+2x)
m=-(y^2+2x)