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anonymous one year ago Help with conjugates (Algebra 2B) equation and explanation in comments.

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1. anonymous

So I need to rationalize the denominator and simplify but I don't know how I would go about that since I can't figure out the conjugate. $\frac{ 15\sqrt{6} }{ 3\sqrt{5} }$

2. SolomonZelman

multiply times √5 on top and bottom

3. SolomonZelman

|dw:1435785908571:dw|

4. anonymous

Ok so the denominator would be 15 but how to I go about multiplying the numerator?

5. SolomonZelman

6 × 5 = 30 same way, (√6) × (√5) = (√30)

6. SolomonZelman

|dw:1435786199555:dw|

7. anonymous

It would just simplify to the square root of 30

8. SolomonZelman

yes

9. SolomonZelman

And √30 can't be simplified, so you are done....

10. anonymous

ok thanks

11. SolomonZelman

yw

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