Posted by **Hope** on Wednesday, June 3, 2009 at 8:08pm.

Use the quadratic formula to solve the equation. Give exact answers:

2x^2 -1 = 6x.

The choices are:

a) -3 + square root(7)/2, -3 - square root(7)/2

b) 3 + square root(11)/2, 3 - square root(11)/2

c) 3 + square root(7)/2, 3 - square root(7)/2

d) -3 + square root(11)/2, -3 - square root(11)/2

I attempted this problem but got none of these answers! Could you please walk me through the problem and tell me which answer is correct? Thank you so much! :)

- Algebra -
**Damon**, Wednesday, June 3, 2009 at 8:19pm
2 x^2 - 6 x - 1 = 0

x = [ 6 +/- sqrt (36 + 8) ] / 4

x = [ 6 + /- sqrt (44) ] / 4

x = [ 6 + /- 2 sqrt (11) ] / 4

x = [ 3 +/- sqrt(11) ] / 2 so b

- Algebra -
**Billy**, Wednesday, May 9, 2012 at 6:39pm
4ã7+3ã3

- Algebra -
**kulani**, Sunday, March 15, 2015 at 10:15am
2x^2-1=6x

2x^2-6x-1=0

a b c and then solve by using the quadratic formula

## Answer This Question

## Related Questions

- algebra - 1.)correct 2.)wrong---> the first term is wrong 4(3a^2)^2 = 36a^4 3...
- Algebra - Rationalize each expression by building perfect nth root factors for ...
- Math simplifying mixed radicals - Please help me simplify these following mixed ...
- Math Help! - Four students worked to find an estimate for square root 22. Who is...
- College Algebra - I need some help with a handful of questions. I need to see ...
- College Algebra - I need some help with a handful of questions. I need to see ...
- Math - Four students work to find an estimate for square root 27. Who is closest...
- math - Four students work to find an estimate for square root 54. Who is closest...
- Math ~CHECK MY ANSWERS~ - 1) Which of these is a rational number? a. Pi b. ...
- College Algebra help please - I need some help with a handful of questions. I ...

More Related Questions