Question

X²+2xy + y²-a²+2 ab-f?​

Answer 1

Step-by-step explanation:

x^2+2xy+y^2-a^2+2ab-b^2

=(x^2+2xy+y^2)-(a^2–2ab+b^2)

=(x+y)^2-(a-b)^2

Applying identity (A^2 - B^2)=(A + B)(A - B)

=(x+y+a-b)(x+y-a+b)

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