Question

x² - 2x + 1=0 me ajudem pfvr​

Answer 1

×(ao quadrado)-2×= -1+0=

2x-2x=1

x=1

Answer 2

${x}^{2} - 2x + 1 = 0 \\ \\ a = 1 \\ b = ( - 2) \\ c = 1 \\ \\ \Delta = {b}^{2} - 4ac \\ \Delta = {( - 2)}^{2} - 4 \times 1 \times 1 \\ \Delta = 4 - 4 \\ \Delta = 0 \\ \\ x = \frac{ - b\pm \sqrt{\Delta} }{2a} \\ \\ x = \frac{ - ( - 2)\pm \sqrt{0} }{2 \times 1} \\ \\ x = \frac{2\pm0}{2} \\ \\ x_{1} = \frac{2 + 0}{2} = \frac{2}{2} = \bf{1} \\ \\ x_{2} = \frac{2 - 0}{2} = \frac{2}{2} = \bf{1}$

$\textbf{Resposta:} \: \text{S} = \{ 1 \}$

Espero ter ajudado! :)