Yr 12 Half term 1

Question 1

What is the discriminant?

Answer 1

b^2-4ac

Question 2

How can you tell from discriminant there is
two equal solution
NO real solutions
2 distinct solution

Answer 2

Two equal = b^2 -4ac=0
NO = b^2-4ac < 0
Two distinct = b^2 -4ac > 0