Question

evaluate the following expression by using the algebraic identity: 1= x^2+y^2 if x+y=7 and xy=10​.
with solution please​

Answer 1

Answer:

refer the attachment

Step-by-step explanation:

refer this above picture

Answer 2

Answer:

x² + y² = 1

[{x+y}² = x² + y² + 2xy]

[{x+y}² = x² + y² + 2xy]=> x²+y² = {x+y}² -2xy

{x+y}²-2xy = 1

7² - 2 x 10 = 1

49-20 = 1

29 ≠ 1

Hence equation is wrong

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