Question

Como faz a equacao do 2 grau :
X²-10x+25=0

Answer 1

X² - 10x + 25 = 0

a= 1; b = - 10; c = 25

∆ = b^2 - 4ac

∆ = (-10)^2 - 4.1.25

∆ = 100 - 100

∆ = 0 (uma raiz)

x = [- b +/- √∆]/2a

x = [ - (-10 +/- √0]/2.1

x = (10/2)

x = 5

x' = x" = 5

R .: S = { 5 }

Answer 2

Resposta:

$S=\{5\}$

Explicação passo-a-passo:

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

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

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

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