Factorise the following.
$81 x^{4} - 121 x^{2}$ .

Open in App

Solution

taking $x^{2}$ common factor
$\begin{matrix} x^{2} {{(9 x)}^{2} - {(11)}^{2}} [x^{2} - y^{2} = (x + y) (x - y)] x^{2} {(9 x - 11) - (9 x + 11)} \end{matrix}$

Suggest Corrections

Similar questions

81 x^{4} - 121 x^{2}

81 x^{4} - 121 x^{2}

81 x^{4} - 16 y^{4}

3 x - \frac{1}{3 x} = 15

81 x^{4} + \frac{1}{81 x^{4}}

If $3 x - \frac{1}{3 x} = 5$ , find :

(i) $9 x^{2} + \frac{1}{9 x^{2}}$

(ii) $81 x^{4} + \frac{1}{81 x^{4}}$

Join BYJU'S Learning Program