Question

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

Answer 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.

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

Answer 2

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: