Question

(x+y) (2x+3y)-(x+y) (x+1)

Answer 1

$(x + y)(x + 3y - 1)$




$2 {x}^{2} + 3yx + 2xy + 3 {y}^{2} - ( {x}^{2} + x + xy + y)$
$2 {x}^{2} + 5xy + 3 {y}^{2} - {x}^{2} - x - xy - y$
${x}^{2} - 4xy + 2 {y}^{2} - (x + y)$