Quadratic Functions

Question 1

Roots of a quadratic function

Answer 1

ax^2+bx+c=0

Question 2

Intercepts

Answer 2

x-intercept where y =0

y-intercept where x=0

Question 3

Coefficient of x^2

Answer 3

Positive: minimum value
Negative: maximum value

Question 4

Turning point

Answer 4

x: axis of symmetry
y: maximum or minimum value

Question 5

Quadratic formula

Answer 5

____________

x=-b/b^2-4ac/2a

Question 6

Writing quadratic expression as a perfect square

Answer 6

a(X+h)^2+k
h=b/2a
k=4ac-b^2/4a

Question 7

Simultaneous equations- one linear one quadratic

Answer 7

Substitute the linear equation into the quadratic equation