Question

If x+y =9 and xy= -22 find (x^2 + y^2)

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Answer 1

Answer:

125

Step-by-step explanation:

(x+y)^2=81. squaring on both sides

x^2+y^2+2xy=81

x^2+y^2-44=81

x^2+y^2=81+44

x^2+y^2=128