Question

4X( X+Y)- (2X+Y)(2X-Y)

Answer 1

4x(x + y) - (2x + y)(2x - y)

= 4x² + 4xy - (4x² - y²)

= 4x² + 4xy - 4x² + y²

= 4xy + y²

Answer 2

đề

Answer 3

\(4x\left(x+y\right)-\left(2x+y\right)\left(2x-y\right)\)

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

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

\(=\left(2x+y-2x\right)\left(2x+y+2x\right)\)

\(=y\left(4x+y\right)\)