exam Maths Puzzle Numerical Ability

((x/(x-2))-(12/((x^2)-4))-(3/(x+2)))=0

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exam Other Question

I need help with 3x^2 - 2x + 1 = 0

I came out with x = 2/6 + sqrt 8/6

Did I do this right?

I see the answer, but am confused on what the "i" means? solve each of the following quadratic inequalities. express your answers in interval notation.

a) 2y^2+5y-63<0

b) 4y^2+10y-14<0

c) x^2+x-30<0