Exemplar Exercise Problems XI — task. Mathematics CBSE, Class 9.

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Factorise the following :

1.

$9x^2 + 4y^2 + 16z^2 + 12xy – 16yz – 24xz$

2.

$25x^2 + 16y^2 + 4z^2 – 40xy + 16yz – 20xz$

3.

$16x^2 + 4y^2 + 9z^2 – 16xy – 12yz + 24 xz$

Answer variants:

$(3x-4y-4z)^2$

$(3x+4y-4z)^2$

$(-5x+4y+2z)^2$

$(4x-2y-3z)^2$

$(4x-2y+3z)^2$

$(5x+4y-2z)^2$

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