Math, asked by smitapatowary02, 27 days ago

If ( a + 1/a ) = 5, then the value of ( a - 1/a ) is

Answers

Answered by iariyan540

1

Answer:

√21

Step-by-step explanation:

(a + 1/a ) = 5

a + 1/a ) = 5(a+1/a)²-(a-1/a)²= 4ab

a + 1/a ) = 5(a+1/a)²-(a-1/a)²= 4ab(5)²-(a-1/a)²=4×a×1/a

a + 1/a ) = 5(a+1/a)²-(a-1/a)²= 4ab(5)²-(a-1/a)²=4×a×1/a-(a-1/a)²= 4-25

a + 1/a ) = 5(a+1/a)²-(a-1/a)²= 4ab(5)²-(a-1/a)²=4×a×1/a-(a-1/a)²= 4-25-(a-1/a)²=-21

a + 1/a ) = 5(a+1/a)²-(a-1/a)²= 4ab(5)²-(a-1/a)²=4×a×1/a-(a-1/a)²= 4-25-(a-1/a)²=-21(a-1/a) = √21

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