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27 April 2005. C/W Expanding Brackets. Aim : To be able to expand brackets of different forms. Expand:. 3( x + 3 ) 7( y + 5 ) 7( 2x + 3y ) 4 2( 3x + 4 ). = 3x + 9 = 7y + 35 = 14x + 21y = 6x + 8. 12( 2a - 3y ) 2( 2x - 3 ) -3( x + 2 )
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27 April 2005 C/W Expanding Brackets Aim : To be able to expand brackets of different forms Expand: • 3( x + 3 ) • 7( y + 5 ) • 7( 2x + 3y ) • 4 2( 3x + 4 ) = 3x + 9 = 7y + 35 = 14x + 21y = 6x + 8 • 12( 2a - 3y ) • 2( 2x - 3 ) • -3( x + 2 ) • 8 -1( 2x + 1 ) = 24a – 36y = 4x - 6 = -3x - 6 = -2x - 1
This can be written as: (y - 5)(y - 3) = y2-3y - 5y+15 = y2 – 8y + 15