Quadratics

Question 1

if a is +ve

Answer 1

open up curve U

Question 2

if a is -ve

Answer 2

open down curve ^

Question 3

Answer 3

quadratic form

Question 4

quadratic formula

Answer 4

Question 5

Answer 5

completing the square form

Question 6

exact form

Answer 6

keep as fraction

Question 7

h=

Answer 7

h=b/2a

Question 8

k=

Answer 8

k=c-b^2/4a

Question 9

Answer 9

Question 10

Answer 10

Question 11

Answer 11

Question 12

Answer 12

Question 13

if its a root

Answer 13

always put +-

Question 14

points of intersection

Answer 14

equate

Question 15

x^2 x x^4

Answer 15

= x^6

Question 16

if ax^4 + bx^2 + c =0

Answer 16

sub u=x^2

Question 17

if ax^6 + bx^3 +c=0

Answer 17

sub u=square root of x

Question 18

discriminant

Answer 18

b^2-4ac

Question 19

if b^2-4ac>0

Answer 19

2 distinct real roots, graph crosses the x-axis at 2 distinct points

Question 20

if b^2-4ac=0

Answer 20

one real root is sometimes called 2 repeated roots or equal roots

Question 21

if b^2-4ac<0

Answer 21

then no real roots or graph does not touch the x axis at all

Question 22

x^1/2=u

Answer 22

x=u^2

Question 23

x^1/3=u

Answer 23

x=u^3

Question 24

x^1/4=u

Answer 24

x=u^4

Question 25

area of a rectangle=

Answer 25

l*w

Question 26

when they say no sattionary point it basically means

Answer 26

no real roots so b^2-4ac<0

Question 27

square root of x * square root of x

Answer 27

x