Question

a+b =7 and ab=12 then the value of a2+b2​

Answer 1

Ans:- a+b =7 and ab=12 (given)

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

= (7)^2 = a^2 + b^2 + 2 × 12

= a^2 + b^2 = 49 - 24

therefore a^2 + b^2 = 25

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