inequality

• Wiskunde
• Middelbare school
• havo
• Leerjaar 3

inequalities

> more than

 5 > 2

< less than

6 < 9

simplify as far as possible

14x = 42

1. x = 28
2. x = 4
3. x = 3
4. 7x = 21

simplify as far as possible

- 5 x = - 25

1. x = 5
2. x = -5
3. x = 20
4. x= -20

simplify as far as possible

8x > 16

1. x > 8
2. 4x > 8
3. 1 > 2
4. x > 2

simplify as far as possible

12 x < 6

1. 2x < 1
2. x < 0.5
3. x > 0.5
4. 2x > 1

1.4 note

simplify negative inequalities

examples

A)            4 < 8       -->    divide by 4    -->   1 <  2

B)                      -4 < 8   -->    divide by - 4  -->    1 < -2    or     1  >  -2   ?  

examples

flip when dividing by a negative number

-3x < 6                                  -x > -7                              7x < -14

simplify
-x < 10

1. x < -10
2. x < 10
3. x > 10
4. x > -10

simplify

4x > 24

1. x > 20
2. x < 6
3. x > 6
4. x < 20

simplify

-7x < 14

1. x < -2
2. x < 2
3. x > -2
4. x > 2

simplify

- 9x > -81

1. x < 9
2. x > 9
3. x < -9
4. x > -9

welke volgorde gebruik je om 5 ( x + 5) > 6x - 14 op te lossen?

haakjes

balansmethode

controleren of > of < omklapt

eerste stap

tweede stap

derde stap

do exercise on page 28-29

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how good do you consider yourself in solving inequalities?

1. unable to solve anything
2. i make a few mistakes and don't know why
3. i make a few mistakes but i DO know why
4. i'm able to solve inequalities