Zero is equal to zero
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That depends on the values of the polynomial but in general:- If the discriminant is greater than zero it has 2 solutions If the discriminant is equal to zero then it has 2 equal solutions If the discriminant is less than zero it has no solutions
If the discriminant of a quadratic equation is zero then it has equal roots. If the discriminant is greater than zero then there are two different roots. If the discriminant is less than zero then there are no real roots.
A negative number is less than zero.
Zero is more than, not less than the number negative 1.
0.50 is less than (<) 0.6; however, it is not greater than (>) 0.5. It is in fact equal to (=) 0.5, as the extra zero does not change the value of the number.