Question

Kết quả của phép tính (x+2y).(y+2x)

Answer 1

\(\left(x+2y\right)\left(y+2x\right)=xy+2x^2+2y^2+4xy=2x^2+2y^2+5xy\)

Answer 2

\(=xy+2x^2+2y^2+4xy=2x^2+5xy+2y^2\)

Answer 3

\(\left(x+2y\right)\left(y+2x\right)=xy+2x^{^2}+2y^{^2}+4xy=5xy+2x^{^2}+2y^{^2}\)

Answer 4

 

x+2y)(y+2x)=xy+2x2+2y2+4xy=2x2+2y2+5xy

Answer 5

\(xy+2x\)²\(+2y\)² +\(4xy\) = \(2x\)² + \(2y\)\(\)² +\(5xy\)