Question

if (a-i/a)=square root 5,find the value of (a+1/a)

Answer 1

GOOD MORNING

a -1/a = √5

SQUARING BOTH SIDE'S

( a -1/a )² = √5²

=>

a² +1/a² = 5 + 2

=>

a² +1/a² = 7

ADDING BOTH SIDE'S BY 2

a² + 1/a² + 2 = 7 + 2

=>

( a +1/a )² = 9

=>

( a +1/a ) = √3²

=>

( a +1/a ) = 3

OR

( a + 1/a ) = -3

Answer 2

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