The Discriminant of the quadratic formula Flashcards
1
Q
What is the discriminant of the quadratic formula?
A
b²-4ac (the bit under the square root)
2
Q
If the discriminant is >0 then the question will say either…
A
2 x intercepts, 2 distinct roots Or 2 real roots (The graph touches the x axis in two places)
3
Q
If the discriminant is =0 then the question will say either…
A
One real root, One solution, Repeated roots, Unique solution, Or Equal roots (The graph touches the x axis only once)
4
Q
If the discriminant is <0 then the question will say either…
A
No solutions or no real roots
The graph doesn’t touch the x axis at all
5
Q
If the discriminant is less than or equal to 0 then the question will say…
A
“Real roots” because it’s not clear if there is 2 roots or if there is one
(The graph could touch the x axis twice or it could touch it only once)