Question

若a,b互为相反数c,d互为倒数求ax的平方y+cdx的立方+bx的平方y-x的立方

Answer 1

a=-b,c=1/d

ax^2y+cdx^3+bx^2y-x^3=ax^2y+c*1/cx^3+(-a)x^2y-x^3=ax^2y+(-a)x^2y+c*1/cx^3-x^3=0