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