Question

X-y=10 and x^2+y^2=18 find the value of x*y

Answer 1

Step-by-step explanation:

Given -

• x - y = 10
• x² + y² = 18

To Find -

• Value of xy

Now,

→ x - y = 10

Squaring both sides :-

→ (x - y)² = (10)²

→ x² - 2xy + y² = 100

→ -2xy = 100 - 18

→ -2xy = 82

→ xy = -41

Hence,

The value of xy is -41.