Sandy W.

asked • 10/27/14

How to solve d^2 +6d^2+8?

The answer cannot have imaginary numbers.
I know the binomials must have d and plus.
i am not sure what to do about the middle section.
 

Byron S.

Should this be d2 + 6d + 8?
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10/27/14

Sandy W.

I thought that too, but the paper has it as d^2 +6k^2+8.
The d^2 +6d +8 makes sense though.
Then the answer would be (d+4) (d+2).
I do not know how to solve this equation without an imaginary number.
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10/27/14

Byron S.

If it's d2 + 6d2 + 8, then it simplifies to 7d2 + 8, and you're right, the only possible solutions are imaginary. I'm guessing it's a typo.
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10/27/14

Sandy W.

*d^2 +6d^2+8
I accidentally put k the second time.
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10/27/14

Sandy W.

*Byron,
 
Thank you for your help.
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10/27/14

Bob T.

In addition to Byran's comment, you may note that that is not a statement: It is an expression. The expression does not equal, say 0. That is, d^2 + 6d +8 = 0 is not the problem, unless by mishap, someone omitted this fact. Then we would continue with (d + 2)(d + 4) = 0. Either  one of the factors equals 0, but not both. d + 2 = 0, or d + 4 = 0 => d = {-4, -2}.  However, let us first clarify what the problem states.

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11/13/14

2 Answers By Expert Tutors

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Martin H. answered • 07/08/19

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There isn't much to solving this expression. You have to combine the like terms. So, combine the d^2. You would then get 7d^2 + 8. In other circumstances, you might have to factor, but since this is a binomial that you aren't solving for, that would be the answer.


Answer: 7d^2 + 8

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