Question

Si: a+b=7 ab=2 Halle: a² + b²
53 46 45

Answer 1

Respuesta:

a = 7 - b,

b (7 - b) = 2

b² - 7b = 2

b² = 7b + 2

b = 7 - a

a (7 - a) = 2

a² - 7a = 2

a² ² 7a + 2