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

(i) - 1 (ii) 1/3 (iii) –1/2

(i) - 1 is the root of given equation.

_{Explanation - Substituting value - 1 in LHS}

=

= 3 - 2 - 1

= 3 - 3 = 0 = RHS

Value satisfies the equation or LHS = RHS.

(ii) is the root of the given euation

_{Explanation - Substituting value in LHS}

=

=

= 1 - 1 = 0 = RHS

Value satisfies the equation or LHS = RHS.

(iii) is not the root of given equation

_{Explanation - Substituting value in LHS}

=

=

= ≠ 0 ≠ RHS

Value does not satisfy the equation or LHS ≠ RHS.