Question

if a2+1/a2=18 find the value of a+1/a and a-1/a
​

Answer 1

Answer:

Step-by-step explanation:

brainliest brainliest brainliest brainliest brainliest brainliest brainliest brainliest brainliest brainliest brainliest brainliest brainliest brainliest brainliest

Answer 2

Step-by-step explanation:

(1) a² +1/a² = 18

(a² + 1/a² + 2) - 2 = 18

(a+1/a)² - 2 = 18

(a+1/a)² = 20

a+1/a = (20)½

(2) a²+1/a² = 18

(a²+1/a²-2)+2 = 18

(a-1/a)² = 16

a-1/a = 4