Question

Expansion of (x+y+3)² is​

Answer 1

Answer:

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Answer 2

${(x + y + 3)}^{2} \\ \\ = ((x + y) + 3) {}^{2} \\ \\ = (x + y) {}^{2} + 2.(x + y).3 + (3) {}^{2} \\ \\ = x {}^{2} + 2xy + y {}^{2} + 6(x + y) + 9 \\ \\ = x {}^{2} + 2xy + y {}^{2} + 6x + 6y + 9$

I hope this helps.