plz help me..........
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shaanbodhp56mnq:
i got the answer but too many people are typing
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0
hope this will be easiest
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dude
silly mistake
xy=5/2
2xy=5
2x=5/y
thays correct only
wat why should we do 2x=5/y
xy=5/2
x=5y/2
Answered by
1
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!
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!
same answer
OMG
Without checking our answers, how can u comment arpita2004.
Tera ni
wat???
see i was commenting to @yaswanrhranker
not to u
just leave it now
wat i also gave the same answe
Brainliest any one answer
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