Question

5).- Si: a + b = 5
a x b = 3
Halla : a² + b²
Solución :​

Answer 1

(a+b) = 5

(a+b)² = 5²

a² + 2ab + b² = 25

a² + 2(3) + b² = 25

a² + 6 + b² = 25

a² + b² = 19