Algebraic Techniques, SMB-066

Factorise the expression `-12y^2+18y-6` (2 marks)

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`6(2y-1)(1-y)\ \ text(or)\ \ 6(1-2y)(y-1)`

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`-12y^2+18y-6=-6(2y^2-3y+1)`

`-6(2y^2-3y+1)=>\ \ `	`text{P}`	`=2xx1=2`
	`text{S}`	`=-3`
	`text{F}`	`=-2,-1`

`-6(2y^2-3y+1)`	`=(-6(2y-1)(2y-2))/2`
	`=-6(2y-1)(y-1)`
	`=6(2y-1)(1-y)\ \ text(or)\ \ 6(1-2y)(y-1)`