Question

xy=18 nd x^+y^=45 then what is the value of x+y?

Answer 1

Answer:

given,

xy=18

x²+y²=45

x+y=?

(x+y)²=x²+y²+2xy

(x+y)²=45+2(18)

(x+y)²=45+36

(x+y)²=81

x+y=root81

x+y=9

Step-by-step explanation:

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