Answers

2015-08-10T11:19:10+08:00
Any formula that is ax²+bx+c=0
where a is not equal to 0 
if it's equal to zero then it's a linear and not a quadratic equation..
also a,b and c are known numbers and x is not
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2015-08-11T18:26:59+08:00
Quadratic equation in one variable is a mathematical sentence of degree 2 that can be written in standard form.
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