Question 154691
I'll assume you meant:
(3+x)y+x^2
where ^ represents exponentiation.
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So, if we started with:
(3+x)y+x^2
We start by distributing the 'y' to each term inside the parentheses:
3y + xy + x^2 (this is your answer)
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You could reorder the terms so we have the highest degree term first:
x^2 + xy + 3y