(b) (3x2 + x - 1) - (4 – 2x2 – x) + x2 - 3
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=3x2 + x - 1 - 4 + 2x2 + x +x2 - 3
=6x2 + 2x -8
=or 3x2 +x - 4
=3x2+4x-3x-4
=x(3x+4) -1(3x+4)
=(3x+4) (x-1)
=or x=-4/3 or x=1
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