Math, asked by arpita2004, 1 year ago

plz help me..........

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shaanbodhp56mnq: i got the answer but too many people are typing

Answers

Answered by yaswanthranker

hope this will be easiest

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shaanbodhp56mnq: dude

shaanbodhp56mnq: silly mistake

shaanbodhp56mnq: xy=5/2

shaanbodhp56mnq: 2xy=5

shaanbodhp56mnq: 2x=5/y

yaswanthranker: thays correct only

yaswanthranker: wat why should we do 2x=5/y

yaswanthranker: xy=5/2

yaswanthranker: x=5y/2

Answered by siddhartharao77

Given x + y = 7/2

On squaring both sides, we get

(x + y)^2 = (7/2)^2

x^2 + y^2 + 2xy = 49/4

x^2 + y^2 + 2(5/2) = 49/4

x^2 + y^2 + 5 = 49/4

x^2 + y^2 = 49/4 - 5

x^2 + y^2 = 49 - 20/4

x^2 + y^2 = 29/4 ------------ (1)

We know that (a - b)^2 = a^2 + b^2 - 2ab.

Now,

(i) (x - y)^2 = x^2 + y^2 - 2xy

= 29/4 - 2(5/2)

= 29/4 - 5

= 9/4

x - y = 3/2

(ii) x^2 - y^2 = (x + y)(x - y)

= (7/2) * (3/2)

= 21/4.

x^2 - y^2 = 21/4.

Hope this helps!

yaswanthranker: same answer

yaswanthranker: OMG

siddhartharao77: Without checking our answers, how can u comment arpita2004.

arpita2004: Tera ni

yaswanthranker: wat???

arpita2004: see i was commenting to @yaswanrhranker

arpita2004: not to u

arpita2004: just leave it now

yaswanthranker: wat i also gave the same answe

siddhartharao77: Brainliest any one answer

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