Question

X ao quadrado - 10x + 25=0

Answer 1

x² -10x +25=0
Δ=b²-4ac     (a=1,b=-10 ,c=25)
Δ=(-10)² -4(1)(25)
Δ=100-100
Δ=0
 x1= 10+0/2 = 5
x2= 10-0/2=5

Answer 2

Resposta:

$S=\{5\}$

Explicação passo-a-passo:

$x^{2} -10x+25=0\\\\a=1\\b=(-10)\\c=25$

$\Delta=b^{2} -4ac\\\Delta=(-10)^{2}-4\times1\times25\\\Delta=100-100\\\Delta=0$

$x=\frac{-b\pm\sqrt{\Delta} }{2a} \\\\x=\frac{-(-10)\pm\sqrt{0} }{2\times1} \\\\x=\frac{10\pm0}{2}$

$x_{1} =\frac{10+0}{2} =\frac{10}{2} =5\\\\x_{2}=\frac{10-0}{2}=\frac{10}{2} =5$