3 years ago

X+ 1/x =5 what is the value x²+1/x²?

1 answer:

3 0

X+ 1/x= 5
⇒ (x+ 1/x)^2= 5^2
⇒ (x+ 1/x)^2= 25
⇒ x^2+ 2(x)(1/x)+ 1/x^2= 25
⇒ (x^2+ 1/x^2)+ 2*1= 25
⇒ x^2+ 1/x^2= 25 -2
⇒ x^2+ 1/x^2= 23

The final answer is 23~

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Vivi is a drummer for a band. She burns 756 calories while drumming for 3 hours. She burns the same number of calories per hour.

sineoko [7]

Divide 756 by 3 to find out how many calories is burned per hour.

756 / 3 = 252
prove this by doing
252 * 3 = 756

Therefore, Vivi burns 252 calories per hour.

Hope this helped! (:

8 0

3 years ago

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RideAnS [48]

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