Question

IF X - 1/X = 3 THEN X^2 +1/X^2 IS EQUAL TO

Answer 1

Answer:

Step-by-step explanation:

GIVEN x - 1/x = 3.

So,

x^2 + 1/x^2

x^2 + ( 1/x )^2 [ACCORDING TO a^2 + b^2 ]

( x - 1/x ) ^2 - 2 * x * 1/x [I HAVE USED x - 1/x , AS IN THE QUESTION THAT VALUE IS GIVEN,  NOT THE x + 1/x ]

KNOW WE WILL PUT THE VALUE OF x - 1/x AND ON THE OTHER HAND    2 * x * 1/ x , x and x gets cancelled and we are left with - 2

SO FINALLY ,

(3)^2 - 2

9 - 2

7 ( ANSWER)