Asked by Juliet

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
Answered by Steve
find the one whose discriminant (b^2-4ac) is zero. That will have a single root. (-b/2a)
Answered by Cody
10+(7x)=5x-9