Question

Which of the following are the roots of 3x² + 2x – 1 = 0?

`1/3`

Answer 1

The given equation is (3x² + 2x – 1 = 0)

On subtracting `x = 1/3` in the given equation, we get : 

L.H.S = 3x² + 2x – 1 

= `3 xx (1/3)^2 + 2 xx 1/3 - 1` 

= `3 xx 1/9 + 2/3 - 1` 

= `(1 + 2 - 3)/3` 

= `0/3` 

= 0 

= R.H.S 

Thus, `(1/3)` is a root of (3x² + 2x – 1 = 0)