Question

Me aydan? Es para el examen gracias

-3x (x+4)=-x + 7

Answer 1

-3x (x+4) = -x + 7

-3x² -12x = -x + 7

3x² + 12x -x + 7 = 0

3x² + 11x + 7 = 0

a=3
b=11
c=7

x = [ -b +- √b²-4ac ] / 2a

x = [ -11 +- √11²-4(3)(7) ] / 2(3)

x = (-11 +- √37 ) / 6

x = (-11+√37)/6 o x = (-11-√37)/6