How Do You?

Question 1

Quadratic formula

Answer 1

Negative b squared minus/plus the square root of b squared minus four a c
Divided by two a

Question 2

Crook problem

Answer 2

Adding an extra parallel line or more to the middle and solving for angle measures

Question 3

Prove by contradiction

Answer 3

By taking the conclusion and saying the opposite is true and contradicting the given information