Question

sabendo que a + b = 10 e ab = 8,calcule o valor de 3(a²+b²)

Answer 1

(a+b)^2 = a^2 +2ab +b^2
10^2 = a^2 + b^2 + 2.8
100-16 =a^2 +b^2
84.3 = 3(a^2 +b^2)
252