Question

factorise: (x+2y)²-1​

Answer 1

$(x + 2y) - 1 \\ 4x + 4y - 1 \\ 7xy$

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Answer 2

Answer:((x+2y+1)(x+2y-1))

Step-by-step explanation:

(x+2y)²-1

=(x+2y)²-(1)²

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