alguien me ayuda a resolver estás ecuaciones xfavor le doy coronita​

Adjuntos:

Respuestas

Respuesta dada por: doraojose
1

Respuesta:

1. 9

2. 15

3. 13

4. 8

5. 2

Explicación paso a paso:

1.

4 {x}^{2}  = 324 \\  {x}^{2}  =  \frac{324}{4}  \\  {x}^{2}  = 81 \\  \sqrt{ {x}^{2} }  =  \sqrt{81}  \\ x = 9

2.

 {x}^{2}  = 225 \\  \sqrt{ {x}^{2} }  =  \sqrt{225}  \\ x = 15

3.

 {x}^{2}  + 21 = 190 \\  {x}^{2}  = 190 - 21 \\  {x }^{2}  = 169 \\  \sqrt{ {x}^{2} }  =  \sqrt{169}  \\ x = 13

4.

2 {x}^{2}  - 8 = 120 \\ 2 {x}^{2}  = 120 + 8 \\ 2 {x}^{2}  = 128 \\  {x}^{2}  =  \frac{128}{2}  \\  {x}^{2}  = 64 \\  \sqrt{ {x}^{2} }  =  \sqrt{64}  \\ x = 8

5.

6 {x}^{2}  + 6 = 30 \\ 6 {x}^{2}  = 30 - 6 \\ 6 {x}^{2}  = 24 \\  {x}^{2}  =  \frac{24}{6}  \\  {x}^{2}  = 4 \\  \sqrt{ {x}^{2} }  =  \sqrt{4}  \\ x = 2

Respuesta dada por: nicoleariste
0

Respuesta:

1)\\4x^{2} = 324\\x^{2} =\frac{324}{4} \\x^{2} =81\\x = \sqrt{81} \\x=9\\\\2)\\x^{2} =225\\x=\sqrt{225} \\x = 15\\\\3)\\x^{2} +21 = 190\\x^{2} =190 - 21\\x^{2} = 169\\x = \sqrt{169}\\x=13\\\\4)\\2x^{2} -8=120\\2x^{2} =120+8\\2x^{2} =128\\x^{2} =\frac{128}{2}  \\x^{2} =64\\x=\sqrt{64} \\x = 8\\\\5)\\6x^{2} +6=30\\6x^{2} =30-6\\6x^{2} =24\\x^{2} =\frac{24}{6} \\x^{2} =4\\x=\sqrt{4} \\x=2

Explicación paso a paso:

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