You can do it in two ways:
1) solve the equation
2) replace the values given in the equation.
To solve the equation you can use the quadratic formula,
x = (- b +/- √[b^2 - 4ac] / (2a)
=> x = { - (-8) +/- √ [ (8^2) - 4(3)(4) ] } / (2*3) = { 8 +/- √ [64 - 48] } (6)
x = { 8+/- √16 } / (6) = { 8 +/- 4 } / 6
x = (8+4) / 6 and x = (8 - 4)/ 6
x - 12 / 6 and x = 4 / 6
x = 2 and x = 2/3
Answer: option A. x = 2 and x = 2/3
