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## neverforgetvivistee 4 years ago simplyfing radical expressions: how do you find x^3-x^2-42x ------------ 2x^2-20x+42

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1. Hero

:/

2. neverforgetvivistee

oops

3. neverforgetvivistee

wait it's not radical it's rational

4. neverforgetvivistee

rational expressions

5. neverforgetvivistee

i learned when it's x^2 but not x^3

6. neverforgetvivistee

i mastered radical expressions by the way

7. Akshay_Budhkar

take the x common in the numerator you get a quadratic equation which is what you know

8. neverforgetvivistee

by everything?

9. neverforgetvivistee

oh wait

10. Sarah.L

$\large{\frac{x^3-x^2-42x}{2x^2-20x+42}= \frac{x(x^2-x-42)}{2x^2-20x+42}}$

11. neverforgetvivistee

oh i see, thanks!

12. Hero

Of course it can be simplified further

13. Sarah.L

yes^

14. Hero

neverforgetvivistee should post her solution on here to make sure it is right

15. Sarah.L

yes^

16. neverforgetvivistee

i got x(x+6)/2(x+3)

17. neverforgetvivistee

wait no it's x-3

18. neverforgetvivistee

x(x+6)/2(x-3)

19. Sarah.L

yeah thats right

20. neverforgetvivistee

nice

21. neverforgetvivistee

i'll master rationals soon

22. Sarah.L

GoodLuck ;)

23. neverforgetvivistee

thanks everyone

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