Question

Answer 1

a) \(A+\left(3x^2y-2xy^3\right)=2x^2y-4xy^3\)

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

\(A=-x^2y-2xy^3\)

 

b) \(A+\left(3x^2-6xy\right)=4x^2+10xy-2y^2\)

\(A=-3x^2+6xy+4x^2+10xy-2y^2\)

\(A=x^2+16xy-2y^2\)

 

c) \(A-\left(2xy+4y^2\right)=3x^2-6xy+5y^2\)

\(A-2xy-4y^2=3x^2-6xy+5y^2\)

\(A=-4xy+3x^2+9y^2\)

 

d) \(\left(6x^2y^2-12xy-7xy^3\right)+A=0\)

\(A=-6x^2y^2+12xy+7y^2\)

 

Answer 2

a: \(A=2x^2y-4xy^3-3x^2y+2xy^3=-x^2y-2xy^3\)

b: \(A=4x^2+10xy-2y^2-3x^2+6xy=x^2+16xy-2y^2\)

d: \(A=-6x^2y^2+12xy+7xy^3\)