[tex] (3x+4)^{2} + 19 = 119[/tex]
[tex] 9x^{2} + 12x + 12x +16 +19 = 119[/tex]
[tex] 9x^{2} + 24x + 16 + 19 = 119[/tex]
[tex] 9x^{2} +24x + 35 = 119[/tex]
[tex] 9x^{2} +24x +35-119=0[/tex]
[tex] 9x^{2} +24x-84=0[/tex]
[tex] x_{1,2}= \frac{-24+/- \sqrt{576-4*9*(-84)} }{2*9} = \frac{-24+/- \sqrt{576+3024} }{18} = \frac{-24+/- \sqrt{3600} }{18} [/tex]
[tex] x_{1}= \frac{-24+60}{18} = \frac{36}{18} =2 [/tex]
x=2
