nat 5 2 Flashcards
1
Q
how to add and subtract common denominators
A
1: kiss -> cross multiply
2: smile -> multiply denominators
3: add/subtract numerators and simplify
2
Q
how to divide fractions
A
keep
flip
change
3
Q
what does √ab =
A
√a + √b
4
Q
what is the rule about adding and subtracting surfs
A
the number under the √ must be the same
5
Q
what does a x √b
— —
√b √b
A
a √b
——-
b
6
Q
what does m x n =
a a
A
m+n
a
7
Q
what is the rule for dividing indices
A
m÷n = m-n
a a a a
8
Q
what does a½ =
A
√α
9
Q
what does a 1/n
A
n √α
10
Q
what does a m/n =
A
( n √a)m
11
Q
what is the completed square form
A
y= (x+a) ² + b
12
Q
what is the equation of a line
A
y = mx + c
13
Q
what does m =
A
gradient
14
Q
what does c =
A
y intercept
15
Q
formula used for straight lines
A
y - b = m (x - a)
