1.

Factorise :X^2 + 1/x^4 - 2-3x+3/x ​

Answer»

ANSWER:

{x}^{2} + \frac{1}{ {x}^{2} } - 2 - 3x + \frac{3}{x} =

{x}^{2} + ( \frac{1}{x} ) {}^{2} - 2 \times x \times \frac{1}{x} - 3(x - \frac{1}{x} ) =

(x - \frac{1}{x} ) {}^{2} - 3(x - \frac{1}{x} ) =

(x - \frac{1}{x} )(x - \frac{1}{x} - 3)


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