Question

simplify this expansion (x+2y+3) (x+2y+7)​

Answer 1

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Answer 2

Step-by-step explanation:

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