Explain, in complete sentences, how you would expand (3x + 7y)^4 using Pascal’s Triangle. I got 3x^4+84x^3y+126x^2y^2+84xy^3+7y^4. Can anyone verify to see if this is correct? :) Thank you very much.

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It is nt correct.

Oh okay, can you show me what I did wrong?

what is the 5th row of pascal's triangle?

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