removing (expanding) double brackets
Post on 09-Jan-2016
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1Menu
2
xx
x
xx
A parking space has to be 5 metres longer than the vehicle’s length and 1 metre wider than its length !
x 5
x
1
Menu
3
x 5
x
1
x + 5
x + 1
Area = Length x Width
= ( x + 5 )( x + 1 )
x2 5x
x 5
x2 5x
x 5
F irst
O uter
I nner
L ast+ + +
Don’t forget to simplify the two middle terms !
6xMenu
I need an expression for the AREA of the parking space.
4
+ × + = +
- × - = +
- × + = -
+ × - = -
( x + 3 )( x + 4 )
X2 4X+
F O I L
3X+ 12+
X2 + 7X + 12
Menu
5
+ × + = +
- × - = +
- × + = -
+ × - = -
( x + 6 )( x + 2 )
X2 2X+
F O I L
6X+ 12+
X2 + 8X + 12
Menu
6
+ × + = +
- × - = +
- × + = -
+ × - = -
( x + 3 )( x - 7 )
X2 7X-
F O I L
3X+ 21-
X2 - 4X - 21
Menu
7
+ × + = +
- × - = +
- × + = -
+ × - = -
( x - 8 )( x + 2 )
X2 2X+
F O I L
8X- 16-
X2 - 6X - 16
Menu
8
+ × + = +
- × - = +
- × + = -
+ × - = -
( x - 4 )( x - 7 )
X2 7X-
F O I L
4X- 28+
X2 - 11X + 28
Menu
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