Question

qual a soluçao de 4x²-27=x²

Answer 1

$4 x^{2} -27= x^{2} \\ 4 x^{2} - x^{2} =27 \\ 3 x^{2} =27 \\ x^{2} =27/3 \\ x^{2} =9 \\ x=+- \sqrt{9} \\ x=+-3 \\ \left \{ {{x=3} \atop {x=-3}} \right. \\ x=[-3,3]$

Answer 2

olá!

4x² - 27 = x²

4x² - x² = 27

       3x² = 27

        x² = 27/3

        x² = 9

        x = + -√9

        x = + /- 3

                 

Bons estudos!