Question

a^2-b^2=9,ab=3.a+b=?.
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Answer 1

Ans. a^2+b^2 = 9

ab = 3

(a+b)^2 = a^2+b^2+ 2ab

(a+b)^2 = 9 + 2 (3)

(a+b)^2 = 9 + 6

(a+b)^2 = 15

(a+b) = √15