Question

Can anyone help me to use the quadratic formula to solve this equation?

4x^2 -9x -1 = 0

Answer 1

http://www.wolframalpha.com/input/?i=4x%5E2+-9x+-1+%3D+0

Answer 2

the quadratic formula is pretty straight forward
just plug your values in

Answer 3

I have and I have an answer, I just want to check if my answer is correct.

Answer 4

i will check your answer what is it :)

Answer 5

x=9 + sqrt. 97/8, and 9 - sqrt 97/8

Answer 6

4x^2 -9x -1 = 0

a=4, b=-9 and c=-1

x=-b+-sqrt(b^2-4ac)/2a

x=9+-sqrt(81+16)/8
x=9+-sqrt(97)/8

x=9 + sqrt. 97/8, and 9 - sqrt 97/8

Answer 7

Nurali you got the same answer as I did so this is correct right? because I also thought it might be x = 1/8 (9-sqrt 97) x = 1/8 (9+ sqrt 97)

Answer 8

Both are right.

Answer 9

Cool! You are racking up medals!