gfields444 Group Title Solve x2 – 3x = 1 2 years ago 2 years ago

1. ParthKohli

Try to bring in that 1 to the other side leaving zilch on the right hand.

2. mathslover

$\large{x^2-3x-1=0}$ $\large{roots=\frac{-b\pm\sqrt{b^2-4ac}}{2a}}$

3. ParthKohli

$\color{Black}{\Rightarrow x^2 - 3x - 1 = 0}$You're all set for problem solving.

4. mathslover

what do you think for a = ? , b = ? , c = ?

5. mathslover

ax^2+bx+c=0 | | | x^2 -3x-1 =0 hence a = 1 , b = -3 and c = 1

6. gfields444

x=3plus/minus sqrt13/2?

7. best.shakir

u can see here the answer and steps http://www.wolframalpha.com/input/?i=x2+%E2%80%93+3x+%3D+1+

8. mathslover

$\large{roots = \frac{3\pm \sqrt{9-4}}{2}}$ $\large{roots=\frac{3\pm\sqrt{5}}{2}}$

9. mathslover

oh wait .. sorry : $\large{roots=\frac{3\pm \sqrt{13}}{2}}$ good

10. best.shakir

u can see in dat link