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## anonymous one year ago Using the quadratic formula to solve 11^2 – 4x = 1, what are the values of x?

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1. anonymous

Make the equation equal to 0 first.

2. anonymous

@dreamstoogood could you double check the equation? thanks

3. anonymous

A. $\frac{ 2 }{ 11 }\pm \frac{ \sqrt{15} }{ 11}$ B. $\frac{ 2 }{ 11 } \pm \frac{ 2\sqrt{15} }{ 11}$ C.$\frac{ 2 }{ 11}\pm \frac{ \sqrt{7} }{ 11 }$ D.$\frac{ 2 }{ 11 }\pm \frac{ \sqrt{7}i }{ 11 }$

4. anonymous

I assume that's 11x^2-4x=1|dw:1437974848344:dw|

5. anonymous

its 11x^2 *** im so sorry!

6. anonymous

Just plug the numbers in the formula, then you're good.

7. anonymous

if i plug in B, since its already negative does it stay negative

8. anonymous

No, it'll be positive.

9. anonymous

4 $\frac{ 4\pm \sqrt{33} }{ 22 }$

10. anonymous

what i have

11. anonymous

You sure you did it correct?

12. anonymous

4+33=37 4-33=-29 and no im not sure at all lol. I tried plugging it in. But i was never good at quadratic formula :\

13. triciaal

|dw:1437976158030:dw||dw:1437976354357:dw|

14. triciaal

or you can review what I just did with the quadratic formula

15. anonymous

Thank you! I will put it in the website rn. I dont have a graphing calculator so ive been using online calculators. & its okay! Also thank you @triciaal ! how did you end up getting 11 from 22? just divide by 2?

16. triciaal

|dw:1437976823333:dw|

17. triciaal

yes 60 = 4* 15 so |dw:1437976967666:dw|

18. triciaal

laughing

19. triciaal

I am so old we did not even have graphing calculators

20. triciaal

you are welcome

21. anonymous

I am pretty sure x = 30

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