x2 - 2x - 15 = 0
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It will then have 2 different roots If the discriminant is zero than it will have have 2 equal roots
(x-9)(x-5)=0x²-14x+45=0
That depends on the equation.
Such an equation has a total of six roots; the number of real roots must needs be even. Thus, depending on the specific equation, the number of real roots may be zero, two, four, or six.
It can tell you three things about the quadratic equation:- 1. That the equation has 2 equal roots when the discriminant is equal to zero. 2. That the equation has 2 distinctive roots when the discriminant is greater than zero. £. That the equation has no real roots when the discriminant is less than zero.