math
posted by Christy .
I am down to 5 out of 49 problems that I can't figure out. Help is very much appreciated. Thanks !
Factor check by multiplying
9x^6y^4 + 45x^4y3 +81 xy

math 
Christy
I noted it wrong it is.
9x^6y^4 +45x^4 y^3 +81 xy
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