Question

Find the product
(s-1/s)^2

Answer 1

Question

(s-1/s)²

Answer:

=(s-1/s)²

= (s-1)²/s²

=s²+1-2s/s²

Formulas used:

(a-b)²= a²+b²-2ab

(a/b)²= a²/b²

Answer 2

Step-by-step explanation:

$= > {( \frac{a}{b} )}^{n} = \frac{ {a}^{n} }{ {b}^{n} }$

$= > {( \frac{s - 1}{s}) }^{2} = \frac{ ({s - 1)}^{2} }{ {s}^{2} }$

• (a - b) ² = a² - 2ab + b²

=> $\frac{(s)²~-~2×s×1~+~(1)²~}{s²}$

=> $\frac{2s~-~2s~+~1}{s²}$

=> $\frac{1}{2s}$