Question

calcular "a-b" si a+b = 4 y ab=2

Answer 1

Respuesta:

2$\sqrt{2}$

Explicación paso a paso:

a=2/b

2/b+b=4

b= $2+\sqrt{2}$ o  $2-\sqrt{2}$

a = $2-\sqrt{2}$

a-b= $2+\sqrt{2}$ - ($2-\sqrt{2}$ )

= 2$\sqrt{2}$