Quadratics

Question 1

What is the Quadratic Function?

Answer 1

-b+-/(b2 – 4ac) / 2a

Question 2

What is the formula for Completing the Square?

Answer 2

p(x + q)^2 + r

Question 3

Explain how to solve Disguised Quadratics.

Answer 3

ax^4 + bx^2 + c
let y = x^2
ay^2 + by + c
Solve using factorisation

Question 4

How do you solve Quadratic Inequalities?

Answer 4

1. Solve quadratic equation
2. Sketch a graph of the equation
3. Decide which is the required set of values
4. Shade the area needed.
   X < 0 - below
   X > 0 - above

Question 5

How do you solve Simultaneous Equations?

Answer 5

Same sign = subtract
Different sign = add
Cancel either the x or y value in each equation, then solve for the other