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 ^-^
