Question

X²-8= -16

2x²=162

X²-9+8=40

Quien me ayuda a resolverlos

Answer 1

Respuesta:

1) 2$\sqrt{2}$i

2) x = 9

3) x = $\sqrt{41}$

Explicación paso a paso:

1)  $x^{2}$ - 8 = - 16

$x^{2}$ = - 16 + 8

$x^{2}$ = - 8

x = $\sqrt{-8}$

x = 2$\sqrt{2}$i

2)

2$x^{2}$ = 162

$x^{2}$ = 162/2

$x^{2}$ = 81

x = $\sqrt{81}$

x = 9

3)

$x^{2}$ - 9 + 8 = 40

$x^{2}$ - 1 = 40

$x^{2}$ = 40 + 1

$x^{2}$ = 41

x = $\sqrt{41}$