Respuesta :

merue

Answer:

[tex]\sqrt{20}[/tex]

Step-by-step explanation:

Try to leave x alone on the left side

[tex]3x^{2} -18 + 5 = 47[/tex]

[tex]3x^{2} -13 = 47[/tex]

To leave alone x, add +13 to both sides. Because left side has -13

[tex]3x^{2} -13 + 13 = 47 + 13[/tex]

[tex]3x^{2} = 60[/tex]

Now x is alone on the  left side

[tex]\frac{3x^{2} }{3} = \frac{60}{3}[/tex]

[tex]x^{2} = 20[/tex]

  • [tex]\sqrt{x} .\sqrt{x} = x[/tex]  <=Rule

So; x=[tex]\sqrt{20}[/tex]

Hope this helps ^-^

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