Question

If y ^ 2 + 1/(y ^ 2) = 11 , find the value of y - 1/y​

Answer 1

Answer:

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Step-by-step explanation:

$y+ y1​ =9Squaring both side(y+ y1​ ) 2 =9 2 y 2 + y 2 1​ +2×y× y1​ =81y 2 + y 2 1​ =81−2=79Squaring(y 2 + y 2 1​ ) 2 =(79) 2 y 4 + y 4 1​ +2×y 2 × y 2 1​ =6241y 4 + y 4 1​ =6,239.$