Two mark exercise problems III — task. Mathematics State Board, Class 8.

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Factorise the following by taking out the common factor:

1.

$6xy - 4y^2 + 12xy - 2yzx =$

2.

$a^3 - 3a^2 + a - 3 =$

3.

$3y^3 - 48y =$

4.

$ab^2 - bc^2 - ab + c^2 =$

Answer variants:

$2y(9x - 2y + zx)$

$(a - 3)(a^2 - 1)$

$(b - 1)(ab + c^2)$

$3(y + 4)(y - 4)$

$2y(9x - 2y - zx)$

$(b - 1)(ab - c^2)$

$(a - 3)(a^2 + 1)$

$3y(y + 4)(y - 4)$

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