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See the document posted above for a CLEARER VIEW of the GIVEN question

can you expand it by multiplication

r there powers

Well first add the like terms .. in both groups ...

IS this ur question \[((x^{2}+3y)+y ^{2})((x ^{2}+3y)-y ^{2}\])

hellooo.........

so, what's the product or the final answer?

ok @whpalmer4
is the answer equal to:
\[x ^{4}+6x ^{2}-y ^{4}+9y ^{2}\]

???????

well .|dw:1372577408636:dw|

u will get \[x ^{4}+3x ^{2}y-x ^{2}y ^{2}+3yx ^{2}+9y ^{2}-3y3+x ^{2}y ^{2}+3y ^{3}-y ^{4}\]

simplify u will get the ans ///