Question

solve 5th question.

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Answer 1

Answer:

ok yeah

Step-by-step explanation:

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Answer 2

Answer:

let the number is x

then it's reciprocal is 1/x

so , x-1/x=9/20

=> (x^2-1)/x=9/20

=> 20(x^2-1)=9x

=> 20x^2-9x-20=0

=> 20x^2-25x+16x-20=0

=> 5x(4x-5)+4(4x-5)=0

=> (4x-5)(5x+4)=0

=> 4x-5=0

=> 4x=5

=> x=5/4

again,

5x+4=0

=> 5x= -4

=> x= -4/5

the number is (5/4 or -4/5)