Question:
Find the product:
(x2 − a2) × (x − a)
Solution:
By horizontal method:
$\left(x^{2}-a^{2}\right) \times(x-a)$
$=x^{2}(x-a)-a^{2}(x-a)$
$=x^{3}-a x^{2}-a^{2} x+a^{3}$
i.e $\left(x^{3}+a^{3}\right)-a x(x-a)$
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