Math, asked by ashish9762, 1 year ago

Please Solve it quickly!!!!

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Answered by beautyandbrains

15/ √10 + √20 + √40 - √5 - √80

= 15/ √10 + 2√5 + 2√10 - √5 - √80

= 15/ √10 + 2√5 + 2√10 - √5 - 4√5

= 15/ 3√10 - 3√5 ( taking 3 common from the demoninator and canceling 15 by 3 hence getting 5 in numerator)

= 5/ √10 - √5

Given for √10 = 3.612 and √5 = 2.236

= 5/ 3.162 - 2.236

= 5/ 0.926

= 5.399 (approx.)

ashish9762: How √20, √40 ,√80 becomes 2√5, 2√10, 4√5 respectively?

beautyandbrains: √20 = √2 x 2 x 5 = √2^2 x 5 = 2√5

beautyandbrains: √40 = √2 x 2 x 10 = √2^2 x 10 = 2√10

beautyandbrains: √80 = √2 x 2 x 2 x 2 x 5 = √2^2 x 2^2 x

beautyandbrains: = 2x2√5 = 4√5

ashish9762: Thank You

ashish9762: But your answer is wrong

ashish9762: The answer is 5.398

beautyandbrains: Sorry had taken the value of √10 wrong, I have edited the answer and corrected it

Answered by ezaetdestroyer

Answer:

Step-by-step explanation:

15/√10+√20+√40-√5-√80

15/3.162+2√5+2√10-2.236-4√5

15/3.162+4.472+6.324-2.236-8.944

15/13.958-11.180

15/2.778

5.399

beautyandbrains: I think your supposed to use the information given in the question and not used a calculator to calculate the values of the roots in the denominator

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