Question

Cần gấp ạ

Answer 1

1: \(\left(2x^3y-5xy^3\right):3xy=B-\frac53y^2\)

=>\(B-\frac53y^2=\frac{2x^3y}{3xy}-\frac{5xy^3}{3xy}=\frac23x^2-\frac53y^2\)

=>\(B=\frac23x^2\)

2: \(\left(4x^4y^4-\frac54x^5y^5\right):3x^2y^2=B-\frac{5}{12}x^3y^3\)

=>\(B-\frac{5}{12}x^3y^3=\frac{4x^4y^4}{3x^2y^2}-\frac54x^5y^5:3x^2y^2=\frac43x^2y^2-\frac{5}{12}x^3y^3\)

=>\(B=\frac43x^2y^2\)