Question

d) x² - 2x + 1 =

preciso pra hj​

Answer 1

Resposta:

x²-2x+1=0

(x-1)²=0

x-1=± √0

x-1+1=1±√0

x=1±√0

x=1±0

x¹ =1

x² =1

Answer 2

Resposta:

S = { 1 }

Explicação passo-a-passo:

d) x² - 2x + 1 = 0

$x = \frac{ - b + - \sqrt{ {b}^{2} - 4ac } }{2a}$

$x = \frac{ - ( - 2) + - \sqrt{ {( - 2) }^{2} - 4.1.1} }{2.1}$

$x = \frac{2 + - \sqrt{( - 2 \times - 2) - 4} }{2}$

$x = \frac{2 + - \sqrt{4 - 4} }{2}$

$x = \frac{2 + - \sqrt{0} }{2}$

$x = \frac{2 + - 0}{2}$

$x1 = \frac{2 - 0}{2}$

$x1 = \frac{2}{2}$

x' = 1

$x2 = \frac{2 + 0}{2}$

$x2 = \frac{2}{2}$

x'' = 1

S = { 1 }