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| QUADRATIC
FORMULA |
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Note: The
quantity b2 - 4ac
is called the discriminant of the quadratic equation, because
its value tells us whether the equation has real solutions
and how many solutions.
- If b2 - 4ac > 0, there are two unequal real solutions.
- If b2 - 4ac = 0, there is a double real root.
- If b2 - 4ac < 0, there is no real solution.
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