Question

if x^2 + 1/x^2=7 find 1) x-1/x , 2) x+1/x , 3) 3x^2 -3/x^2​

Answer 1

Step-by-step explanation:

x^2+(1/x^2)=7

x-(1/x)=??

square x-(1/x)

x^2-2+(1/x^2)

substitute

x^2+(1/x^2)=7

7-2=5

(x-[1/x])^2=5

take the square root of both sides

x-(1/x)=√5

Answer 2

solution starts from left side !

hopefully its helped u :)