Question 58 (j)

Subtract:

$11 - 15 y^{2}$ from $y^{3} - 15 y^{2} - y - 11.$

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Solution

We have,
$y^{3} - 15 y^{2} - y - 11 - (11 - 15 y^{2}) = y^{3} - 15 y^{2} - y - 11 - 11 + 15 y^{2}$
On combining the like terms,
$= y^{3} - 15 y^{2} + 15 y^{2} - y - 11 - 11 = y^{3} - y - 22$

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