Question

ai giúp mik đc ko ạ

Answer 1

5:

a: \(\Leftrightarrow A-B+2xy^2-x^2y=3x^2y\)

=>\(A-B=3x^2y+x^2y-2xy^2=4x^2y-2xy^2\)

b: \(\Leftrightarrow A-B-\dfrac{3}{8}xy^2=\dfrac{3}{4}xy^2-\dfrac{1}{2}xy^2=\dfrac{1}{4}xy^2\)

=>\(A-B=\dfrac{1}{4}xy^2+\dfrac{3}{8}xy^2=\dfrac{5}{8}xy^2\)

c: \(\Leftrightarrow-2x^2y^3-\left(A-B\right)=8x^3y^2\)

=>\(A-B=-2x^2y^3-8x^3y^2\)