Question

Alguem me ajuda pfv é pra amanhã (VALENDO 30 PONTOS)

Answer 1

Explicação passo-a-passo:

as raizes vão ser:

x=-b±Δ/2a

x1=-13+25/2.-6=2

x2=-13-25/2.-6=-38/-6=19/3

Answer 2

$\frac{2x}{2x-4} +6=3x\\2x+6(2x-4)=3x(2x-4)\\2x+12x-24=6x^{2}-12x\\14x-24=6x^{2}-12x\\-6x^{2}+14x+12x-24=0\\-6x^{2}+26x-24=0\\3x^{2}-13x+12=0\\\\Delta = b^{2} -4ac\\Delta=(-13)^{2} -4.3.12\\Delta=169-144\\Delta=25\\\\x=\frac{-b+-\sqrt{Delta} }{2a} \\x=\frac{13+-5}{6} \\x'=\frac{13+5}{6} =\frac{18}{6} =3\\x''=\frac{13-5}{6}=\frac{8}{6}  =\frac{4}{3}$