EmmaH 2 years ago im really confused and tired can someone help me?Estimate the roots of the equation by graphing. Round to the nearest tenth and write in set form, such as {-1.2,3.4}. x2 - 6= 0

1. EmmaH

how do i solve that?

2. ParthKohli

add 6 to both sides, take the square root.

3. EmmaH

x^2=6?

4. ParthKohli

Yes, now what are the square roots of 6?

5. EmmaH

2.44948974278

6. ParthKohli

Now round to the nearest tenth

7. EmmaH

2.4

8. ParthKohli

Note that there is a negative sqrt too.

9. mathstudent55

An equation of the form x^2 = a, a > 0 has two roots: x = sqrt(b) and x = -sqrt(b) Since you have x^2 = 6, just find the square root of 6. Then one root is the positive square root of 6 and the other root is the negative square root of 6.

10. EmmaH

2.4,-2.4

11. ParthKohli

that is right!

12. EmmaH

13. ParthKohli

Yes.

14. Koikkara

well.....is it 3??|dw:1361077277418:dw|

15. mathstudent55

Write in a set: {-2.4, 2.4}

16. EmmaH

thank you so much my brain is shutting down bcs im tired

17. ParthKohli

no problem :-)

18. EmmaH

:D

19. Koikkara

well, ....u guys r great...