Question

evaluate the following I need 3rd sum answer ​

Answer 1

Step-by-step explanation:

to find (x+y), if x-y=2√3 and xy= 1

using (x+y)²-(x-y)²= 4xy

(x+y)²-(2√3)²= 4×1

(x+y)²- 4×3= 4

(x+y)²= 4+12

(x+y)= √16

x+y= 4

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