Question

Rezolvați ecuația: 3(x² + 4x + 7) = 4(3x + 8) + 1​

Answer 1

$3(x {}^{2} + 4x + 7) = 4(3x + 8) + 1 \\ 3 x {}^{2} +\sout{ 12x} + 21 = \ \sout{12x} + 32 + 1 \\ 3x {}^{2} + 21 = 33 \\ 3x {}^{2} = 12 \\ x {}^{2} = 4 \\ x = \pm \sqrt{4} \\\sout{ - - - - - - - - - - - - - - - } \\ x _{1} = - 2 \\ x _{2} = 2$