Question

si a+b = 3 , ab = 2. halla a²+b²​

Answer 1

Respuesta:

5

Explicación paso a paso:

$a + b = 3$

$ab = 2$

${(a + b)}^{2} = {3}^{2} \\ {a}^{2} + {b}^{2} + 2ab = 9 \\ {a}^{2} + {b}^{2} = 9 - 2(2) \\ {a}^{2} + {b}^{2} = 5$