Question

if x=root 7 + root 5 y=root 7-root 5 find the value of x+y x-y xy​

Answer 1

Answer:

x+y= 2root7.

x-y= 0.

xy=2

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

x+y=√7+√5+√7-√5=2√7

x-y=√7+√5-√7+√5=2√5

xy= (√7+√5)(√7-√5)=7-5=2