Question

Solve the following equation using the formula: 

3x² + 2x – 1 = 0

Answer 1

3x² + 2x – 1 = 0

Here a = 3, b = 2 and c = −1  

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

= `(-(2) +- sqrt((2)^2-4(3)(-1)))/(2(3)` 

= `(-2 +- 4)/6`

= `(-2 + 4)/6` and `(-2 - 4)/6`

= `1/3` and −1