Question

  

Answer 1

a) \(2x^2+A=4,5x^2\)

\(\Leftrightarrow A=4,5x^2-2x^2\)

\(\Leftrightarrow A=2,5x^2\)

b) \(-2,5m^2n+B=5m^2n\)

\(\Leftrightarrow B=5m^2n+2,5m^2n\)

\(\Leftrightarrow B=7,5m^2n\)

c) \(C-3,2ab^3=-11ab^3\)

\(\Leftrightarrow C=-11ab^3+3,2ab^3\)

\(\Leftrightarrow C=-7,8ab^3\)

d) \(-xyz^2-D=5xyz^2\)

\(\Leftrightarrow D=-xyz^2-5xyz^2\)

\(\Leftrightarrow D=-6xyz^2\)

Answer 2

a) \(2x^2+A=4,5x^2\)

\(\Rightarrow A=4,5x^2-2x^2\)

\(\Rightarrow A=2,5x^2\)

b) \(-2,5m^2n+B=5m^2n\)

\(\Rightarrow B=5m^2n-\left(-2,5m^2n\right)\)

\(\Rightarrow B=7,5m^2n\)

c) \(C-3,2ab^3=-11ab^3\)

\(\Rightarrow C=-11ab^3+3,2ab^3\)

\(\Rightarrow C=-7,8ab^3\)

d) \(-xyz^2-D=5xyz^2\)

\(\Rightarrow D=-xyz^2-5xyz^2\)

\(\Rightarrow D=-6xyz^2\)

#Ayumu

Answer 3

a: 2x^2+A=4,5x^2

=>A=4,5x^2-2x^2=2,5x^2

b: B-2,5m^2n=5m^2n

=>B=5m^2n+2,5m^2n=7,5m^2n

c: C-3,2ab^3=-11ab^3

=>C=-11ab^3+3,2ab^3=-7,8ab^3

d: -xyz^2-D=5xyz^2

=>D=-xyz^2-5xyz^2=-6xyz^2