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

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Expand the following :

i.

$(4a – b + 2c)^2=$

$i a^{2} + i b^{2} + i c^{2} + i ab + i bc + i ac$

ii.

$(3a – 5b – c)^2=$

$i a^{2} + i b^{2} + i c^{2} + i ab + i bc + i ac$

iii.

$(– x + 2y – 3z)^2=$

$i a^{2} + i b^{2} + i c^{2} + i ab + i bc + i ac$

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