Question

3xla a doua + 2,01=2,1

Answer 1

   
[tex]\displaystyle\\ 3x^2+2,01 = 2,1\\\\ 3x^2 = 2,1 -2,01 \\\\ 3x^2= 0,09\\\\ x^2 = \frac{0,09}{3}\\\\ x^2 = 0,03\\\\ x^2 = \frac{3}{100}\\\\ x = \pm \sqrt{\frac{3}{100}}= \pm \frac{ \sqrt{3} }{10}\\\\ x_1 = \boxed{\frac{ \sqrt{3} }{10}} \\\\ x_2 = \boxed{-\frac{ \sqrt{3} }{10}} \\\\ [/tex]