If x+y=8 and xy=15/4, find the value of x-y
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Answered by
7
Hi there!
Given,
x + y = 8 ---(i) n' x/y = 15/4. ---(ii)
On squaring Eqn. (i)
(x + y)² = 64
We know that,
(x - y)² = (x + y)² - 4xy
(x - y)² = 64 - 4 × 15/4
(x - y)² = 64 - 15
(x - y)² = 49
x - y = ±√ 49
x - y = ± 7
Hence,
Value of [ x - y ] = ± 7
Hope it helps! :D
Cheers,
Ishaan Singh
Given,
x + y = 8 ---(i) n' x/y = 15/4. ---(ii)
On squaring Eqn. (i)
(x + y)² = 64
We know that,
(x - y)² = (x + y)² - 4xy
(x - y)² = 64 - 4 × 15/4
(x - y)² = 64 - 15
(x - y)² = 49
x - y = ±√ 49
x - y = ± 7
Hence,
Value of [ x - y ] = ± 7
Hope it helps! :D
Cheers,
Ishaan Singh
Answered by
5
see in attachment i hope u understand
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