Question

resolva a equação : 1+x/2(x-1)=x

Answer 1

1+(x/2).(x-1) = x
1+(x²-x)/2 = x
2+x²-x = 2x
2+x²-x-2x = 0
x²-3x+2 = 0
/\ = (-3)² - 4.1.2
/\ = 9 - 8
/\ = 1
x = (-(-3)+/-\/1)/2.1
x = (3+/-1)/2
x' = (3+1)/2 = 4/2 = 2
x" = (3-1)/2 = 2/2 = 1
S = {1, 2}