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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