Question

(2r-2)(2r-2)=256
Valor de r
Ayuda!

Answer 1

Respuesta:

r = {- 7 ; 9}

Explicación paso a paso:

(2r - 2)(2r - 2) = 256

$(2r - 2)^{2}$ = 256

2r - 2 = $\sqrt{256}$

2r - 2 = ± 16

2r - 2 = 16

2r = 16 + 2

2r = 18

r = 18/2

r = 9

2r - 2 = - 16

2r = - 16 + 2

2r = - 14

r = - 14/2

r = - 7

Rpta.:  r = {- 7 ; 9}