Question

If a not equal to 0,and a-1/a=3,find a2+1/a2

Answer 1

Answer:

a2+1/a2=6

Step-by-step explanation:

and) a=3

a2+1/a2=?

now use this formula

(a-b) 2 =a2+ b2- 2ab

so.,(a-1/a) 2=a2+1 /and 2×a1/a

a2+1/a-2

(a-1/a) 2=a2+1/a2-a

(3)2=a2+1/a2-2

9-2 =a2+1/a2

answer= a2+ 1/a2=6