Download - Removing (Expanding) Double Brackets
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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
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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.
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+ × + = +
- × - = +
- × + = -
+ × - = -
( x + 3 )( x + 4 )
X2 4X+
F O I L
3X+ 12+
X2 + 7X + 12
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5
+ × + = +
- × - = +
- × + = -
+ × - = -
( x + 6 )( x + 2 )
X2 2X+
F O I L
6X+ 12+
X2 + 8X + 12
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+ × + = +
- × - = +
- × + = -
+ × - = -
( x + 3 )( x - 7 )
X2 7X-
F O I L
3X+ 21-
X2 - 4X - 21
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+ × + = +
- × - = +
- × + = -
+ × - = -
( x - 8 )( x + 2 )
X2 2X+
F O I L
8X- 16-
X2 - 6X - 16
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+ × + = +
- × - = +
- × + = -
+ × - = -
( x - 4 )( x - 7 )
X2 7X-
F O I L
4X- 28+
X2 - 11X + 28
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