Math, asked by taj9513, 11 months ago

x+y = 5 and xy =4
find x-y

Answers

Answered by jaival12

5

Answer

3

(x+y)2 = x2 - 2xy + y2

= x2 + 2xy + y2 - 4xy

= (x+y)2 - 4xy

= 52 - 4 × 4

= 25 - 16 = 9

∴ x - y = √9

= 3

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