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Mathematics 7 Online
OpenStudy (anonymous):

Multiply (4x+9)(7x^2+3x+9)

OpenStudy (anonymous):

I get 28x^3+75x^2+63x+81

OpenStudy (anonymous):

just wanted to make sure that this was the right answer.

myininaya (myininaya):

4x(7x^2+3x+9) + 9(7x^2+3x+9) = 28x^3+12x^2+36x + 63x^2+27x+81 = 28x^2+75x^2+63x+81

OpenStudy (anonymous):

so I was right?

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