Question

If x + y =9 and xy = 20, then find the value of x² + y²

Answer 1

X = 5

Y = 4

5²+4²

= 25+16

= 41

BCS 5 plus 4 is equal to 9 and 5 X 4 is equal to 20

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Answer 2

Answer:

The value of x²+y² is 41

Step by step explanation:

Given x+y=9,xy=20

[x+y]²=x²+y²+2xy

[9]²=x²+y²+2×20

81=x²+y²+40

x²+y²=81-40

x²+y²=41