Question

(2x+y)^2+(3x+y)(3x-y)-13x^2 

 

 

Answer 1

giúp mik với cần gấp

 

Answer 2

\(\left(2x+y\right)^2+\left(3x+y\right)\left(3x-y\right)-13x^2=4x^2+4xy+y^2+9x^2-y^2-13x^2=4xy\)

Answer 3

\(\left(2x+y\right)^2+\left(3x+y\right)\left(3x-y\right)-13x^2\)

\(=4x^2+4xy+y^2+9x^2-y^2-13x^2=4xy\)

Answer 4

\(\left(2x+y\right)^2+\left(3x+y\right)\left(3x-y\right)-13x^2\)

\(=4x^2+4xy+y^2+9x^2-y^2-13x^2\)

\(=4xy\)