Question

cómo se resuelve√81x²​

Answer 1

Respuesta:

Explicación paso a paso:

Resolver.

81x² = 9

x² = 9/81

x² = 1/9

x = √1/9    Tiene 2 soluciones

x = 1/3

 o

x = - 1/3

Solucion.

(1/3 , - 1/3)

Con formula.

81x² = 9

81x² - 9 = 0

a = 81

b = 0

c = -9

x = [- b+/- √(b² - 4ac)]/2a

x = [ - 0 +/-√(0 - 4(81)(-9)] (2*81)

x = [+/-√(2916)]/162

x = +/-54 /162

x = +/- 1/3

x1 = 1/3

x 2 = - 1/3

Solucion.

(1/3 , - 1/3)

Answer 2

Respuesta:

81 - x² = (9-x)(9+x). A taffy927x2