dave13 wrote:
Quote:
Hidave13
While factorization works well for most GMAT like questions but you should also remember the formula to calculate roots of the equation which you can use for complex quadratic equation such as the above.
The formula to calculate the roots of the quadratic equation is
\(-b±\sqrt{b^2-4ac}/2a\)
substitute the values of a,b & c in this formula, you will get your answer
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