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There are 5 quadratics below. Four of them have two distinct roots each. The other has only one distinct root; find the value o...Asked by Zane
There are 5 quadratics below. Four of them have two distinct roots each. The other has only one distinct root; find the value of that root.
4x^2 +16x - 9
2x^2 + 80x + 400
x^2 - 6x - 9
4x^2 - 12x + 9
-x^2 + 14x + 49
4x^2 +16x - 9
2x^2 + 80x + 400
x^2 - 6x - 9
4x^2 - 12x + 9
-x^2 + 14x + 49
Answers
Answered by
Steve
check the discriminants: b^2-4ac
If the discriminant is zero, there is only one root.
If the discriminant is zero, there is only one root.
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