Question

If a + b = 4, ab = 3, then a² + b² =?

Answer 1

Answer:

10

Step-by-step explanation:

given a+b =4 , ab=3

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

=>  (a+b)^2 - 2ab= a^2 +b^2

=> (4)^2-2(3) = a^2 +b^2

=> 16-6= a^2 +b^2

=> a^2 +b^2 = 10