Question

plz solve this i will mark him/her brainliest ​

Answer 1

Answer:

14 is the answer of first question

_______________

Explanation:

If a - 1/a = 4 then find a² - 1/a²

Given:

$a\:+\:\frac{1}{a}\:=\:4$

We have to find value of a² – $\frac{1}{a²}$

Solution:

(a)² – $(\frac{1}{a²})²\:=\:(a\:+\:\frac{1}{a})² \: - \: 2a\:×\:\frac{1}{a}$

$=\: (4)²\: - \:2$

$=\: 16\: -\:2$

$=\:14$

Answer 2

14 is ur answer refer to attachment for steps