Quadratics Flashcards
1
Q
if a is +ve
A
open up curve U
2
Q
if a is -ve
A
open down curve ^
3
Q
A
quadratic form
4
Q
quadratic formula
A
5
Q
A
completing the square form
6
Q
exact form
A
keep as fraction
7
Q
h=
A
h=b/2a
8
Q
k=
A
k=c-b^2/4a
9
Q
A
10
Q
A
11
Q
A
12
Q
A
13
Q
if its a root
A
always put +-
14
Q
points of intersection
A
equate
15
Q
x^2 x x^4
A
= x^6
16
Q
if ax^4 + bx^2 + c =0
A
sub u=x^2
17
Q
if ax^6 + bx^3 +c=0
A
sub u=square root of x
18
Q
discriminant
A
b^2-4ac
19
Q
if b^2-4ac>0
A
2 distinct real roots, graph crosses the x-axis at 2 distinct points
20
Q
if b^2-4ac=0
A
one real root is sometimes called 2 repeated roots or equal roots
21
Q
if b^2-4ac<0
A
then no real roots or graph does not touch the x axis at all
22
Q
x^1/2=u
A
x=u^2
23
Q
x^1/3=u
A
x=u^3
24
Q
x^1/4=u
A
x=u^4
25
Q
area of a rectangle=
A
l*w
26
Q
when they say no sattionary point it basically means
A
no real roots so b^2-4ac<0
27
Q
square root of x * square root of x
A
x
