Question

simplify (x+2y)(3x-y)-(x+y)(x-y)​

Answer 1

Answer:

2 x^2 + 5 x y - y^2

1/8 (4 x + 5 y)^2 - (33 y^2)/8

x (2 x + 5 y) - y^2

Step-by-step explanation:

Answer 2

Step-by-step explanation:

$(x + 2y)(3x - y) - (x + y)(x - y)$

$= 3 {x}^{2} - xy + 6xy - 2 {y}^{2} - ( {x}^{2} - {y}^{2} )$

$= 3 {x}^{2} + 5xy - 2 {y}^{2} - {x}^{2} + {y}^{2}$

$= 2 {x}^{2} - {y}^{2} + 5xy$

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