A quadratic equation is a one-variable polynomial equation of the second degree whose general form is:
ax2 + bx + c = 0,
where a, b and c are constants with a ≠ 0, and x represents a variable. A quadratic equation can be solved by factoring, completing the square method, graphing and using quadratic formula. A quadratic equation has two solutions, called roots. The two solutions may be or may not be distinct and may or may not be real. A quadratic equation is solved by completing the square method by using the following steps:
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