Question

19a-3a(a-6)=66

Answer 1

19a-3a ^2 +18a=66
37a-3a^2=66
37-3a^2-66=0
\[\Delta=37^{2}-4(-3)(-66)\]
a1=\[\frac{ (-37+\sqrt{\Delta}) }{ -6}\]
a2=\[\frac{ (-37-\sqrt{\Delta}) }{ -6}\]