Question

if a-1/a=4,then a^2+1/a^2=?

Answer 1

Solution (✌️✌️✌️)

$a - \frac{1}{a} = 4 \\ = > (a - \frac{1}{a} ) {}^{2} = 4 {}^{2} \\ = > a {}^{2} + \frac{1}{a {}^{2} } - 2a. \frac{1}{a} = 16 \\ = > a {}^{2} + \frac{1}{a {}^{2} } = 18$

Answer 2

Answer:

a^2+1/a^2=10

Step-by-step explanation:

a-1=4a

thena=-1/3