Question

Given (x+y) = 20 and xy= 15, find the value of x²+y²

Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

x²+y²=(x+y)²-2xy

x²+y²=(20)²-2.15

x²+y²=400-30

x²+y²=370