Factorise :2y 2 -4y 2 -2y+4
qais:
i think it is 2y3???
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37
2y³ -4y² -2y +4
=2y³- 2y² -2y² +2y-4y +4
=2y²(y-1) -2y(y-1) -4(y-1)
=(y-1)(2y²-2y-4)
=2(y-1)(y²-y-2)
=2(y-1)(y²-2y+y-2)
=2(y-1)[y(y-2)+1(y-2)]
=2(y-1)(y-2)(y+1)
=2y³- 2y² -2y² +2y-4y +4
=2y²(y-1) -2y(y-1) -4(y-1)
=(y-1)(2y²-2y-4)
=2(y-1)(y²-y-2)
=2(y-1)(y²-2y+y-2)
=2(y-1)[y(y-2)+1(y-2)]
=2(y-1)(y-2)(y+1)
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