Question

resolva a equação x2-2x+1=4​

Answer 1

$2x+4=x+6\\ \mathrm{Subtrair\:}4\mathrm{\:de\:ambos\:os\:lados}\\ 2x+4-4=x+6-4\\ \mathrm{Simplificar}\\ 2x=x+2\\ \mathrm{Subtrair\:}x\mathrm{\:de\:ambos\:os\:lados}\\ 2x-x=x+2-x\\ \mathrm{Simplificar}\\ x=2$