Question

Euquação do 2° grau A) x2-6x+8=0

Answer 1

x^2 - 6x + 8 = 0

a = 1 ; b = -6 ; c = 8

formula delta
============

D = b^2 - 4 a c

D = ( - 6)^2 - 4 (1) (8)

D = 36 - 4(8)

D = 36 - 32

D = 4

formula de braskara
==================

x = - b - , + \/D
..... _________
................2a

x = - (6) - , + \/4
......__________
................2(1)

x = 6 - , + 2
......______
............2

x1 = 6 - 2
.......____
...........2

x1 = 4
.......__
........2

x1 = 2


x2 = 6 + 2
........____
............2

x2 = 8
.........__
..........2

x2 = 4