Question

A Question ↓ If x+y = 10 & xy = 30, find x² + y²

Answer 1

(x+y)² = x² + 2xy + y²

(10)² = x² + y² + 2 * 30

100 = x²+y² * 60

x² + y² = 100-60

x² + y² = 40

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Answer 2

Answer:

Given that,

x+y=10, xy=30

Squaring on both sides,

(x+y)²=100

x²+y²+2xy=100

x²+y²+60=100

x²+y²=40

Step-by-step explanation:

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