Question

if x + y = 7 and xy = 3, find the value of x^2 + y^2

Answer 1

Answer:

x+y=7

xy=3

we know that, (x+y)^2=x^2+y^2+2xy

(7)^2= " " +2(3)

49= " " +6

x^2+y^2=43

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