asghartab6
asghartab6
13-11-2020
Mathematics
contestada
2) If x+y=6 and xy=5 find x-y?
Respuesta :
mhanifa
mhanifa
13-11-2020
Answer:
x - y = ± 4
Step-by-step explanation:
Given
x + y = 6 and xy = 5
To find
x - y
Solution
(x - y)² = (x + y)² - 4xy = 6² - 4*5 = 36 - 20 = 16 = 4²
(x - y)² = 4²
x - y = ± 4
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