SOLUTION: 18d^2+36d+10=0 The answer is - 1/5 , - 1/3 I just don't know how to get there

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Question 326091: 18d^2+36d+10=0
The answer is - 1/5 , - 1/3 I just don't know how to get there
Answer by solver91311(24713) (Show Source):
You can put this solution on YOUR website!

So if is a root, then:

Which is true. So far, so good, plus a good side-effect is that we know that one of the factors of the trinomial is

if is a root, then:

Oops! Warning! Danger, Will Robinson. is NOT a root of:

Let's go back and factor. First take out a 2:

Since we know that is a factor, the other factor has to be . Verify using FOIL (left as an exercise for the student.)

Since the other factor is , the second root must be

Check:

Answer checks. Who told you the answers? Go get your money back.

John