Factor.

3n4+21n3+27n2

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To factor out the expression we look for number which is divisible by every term in our case it is 3n^2:

3n^4+21n^3+27n^2

we first begin by factoring out 3n^2, this will give us;

3n^2(n^2+7n+9)

hence, since we cannot factorize the quadratic expression the answer remains to be:

3n^2(n^2+7n+9)

Step-by-step explanation:

pls ask

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation: