Maria P. answered • 05/26/15
Tutor
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This polynomial is not prime because it can be factored!
30z^2 + 33z + 9
Can be factored into:
(15z+9)(2z+1)<---Answer.
Explanation:
When you multiply 15z*2z = 30z^2
When you multiply 15z*1 = 15z
When you multiply 9*2z = 18z
When you multiply 9*1= 9
30z^2+15z+18z+9 = 30z^2+33z+9 <---Original problem
David W.
Any reason for not writing the factors as (3)(5z+3)(2z+1) ?
This is how we find prime factors and how we determine roots.
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05/26/15
Maria P.
Yes, it is also an option to write in that way.
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05/26/15
Stephanie M.
tutor
Actually, when a problem asks you to factor completely, you'll want to give David's answer:
3(5z+3)(2z+1)
That's the only version of the equation where everything that can be factored
has been factored.
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05/26/15
Asterly S.
05/26/15