Question

If x-y =4 and x2+y2=80 find xy

Answer 1

Answer:

xy = 32

Step-by-step explanation:

Given:

x - y = 4

x² + y² = 80

To Find:

Value of xy.

Identity Used:

(a-b)² = a² + b² - 2ab

Solution:

(x-y)² = x² + y² - 2xy

=> (4)² = 80 - 2xy

=> 16 = 80 - 2xy

=> 2xy = 80-16

=> 2xy = 64

=> xy = 64/2

=> xy = 32

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Answer 2

Answer:

refer the attachment ✅✅

Step-by-step explanation:

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