Question

expand:(x+2y+3) (x+2y+7)​

Answer 1

Answer:

given: (x+2y+3) (x+2y+7)

x(x+2y+7) + 2y(x+2y+7) + 3(x+2y+7)

x^2+2xy+7x+2xy+4y^2+14y+3x+6y+21

x^2+4xy+4y^2+10x+20y+21

Answer 2

$\huge\underline{\boxed{\boxed{\mathfrak{\orange{Solution}}}}}$

$(x + 2y + 3)(x + 2y + 7) \\ = {x}^{2} + 2xy + 7x + 2xy + 2 {y}^{2} + 14y + 3x + 6y + 21 \\ = {x}^{2} + 2 {y}^{2} + 2xy + 2xy + 7x + 3x + 14y + 6y + 21 \\ = {x}^{2} + 2 {y}^{2} + 4xy + 10x + 20y + 21$

Hence,the expand form is

${x}^{2} + 2 {y}^{2} + 4xy + 10x + 20y + 21$

$\huge\underline\mathfrak\color{purple}{Thankuhh}$