Question

$(3x + y) {}^{2}$
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Answer 1

Answer:

(3x+y)^2= (3x)^2+(y)^2 +2×3x×y

=9x^2+y^2+6xy

Answer 2

I hope it will be helpful for you.

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