Question

If x-y = 3 and xy = 7 find the value of x² + y²
please answer fast and correctly​

Answer 1

Step-by-step explanation:

Given:

x + y = 7

x – y = 3

Add the two equations to get: 2x = 10, which means x = 5

If x = 5, we can plug that value into either equation, to conclude that y = 2

If x = 5 and y = 2, then x² - y² = 5² - 2² = 25 - 4 = 21

Answer 2

Pls refer to the picture above.... Hope you understand