Question

resolva as equacoes de 2 grau -x2+6x-5=0

Answer 1

-x2+6x=5+0

-4x=5

5sobre4x

Answer 2

-X^2+6x-5=0 a=- 1 b= 6 c= -5 / Fórmula de Bhaskara: Delta= b^2 -4.a.c / Delta= 6^2-4.(-1).(-5) / Delta= 36 -20= 16 / Encontrando o x, utilizando a fórmula: X= -b +/- raiz de delta/ 2.a / X= -6 +/- raiz de 16/ 2.(-1) / X= -6 +/- 4/ -2 / X'= -10/-2=5 / X"= -2/-2= 1 S {5,1}