## anonymous 5 years ago 2y^2-7=91

1. amistre64

+- that is :)

2. amistre64

try that again...

3. amistre64

y = $$\pm \sqrt{{98\over2}}$$

4. amistre64

+- 7

5. anonymous

what does that other one say y=+-(sqrt) of what

6. amistre64

y = +- sqrt(98/2)

7. anonymous

k thanks

8. anonymous

how did you get 98

9. anonymous

84 + 7

10. anonymous

Add seven from both sides so now you have 2y^2=98. Divide both sides by 2 and get y^2=49. Square root both sides and get 7.