Question

X2+4x+3 ayudaaaaaaaaaaa

Answer 1

Respuesta:

$x_{1}= 0.5\\x_{2}= -1.5$

Explicación paso a paso:

x² + 4x + 3

$-b +-\sqrt{b^{2} } - 4ac / 2a$

Sustitución:

a= 1

b= 4

c= 3

$-1 +- \sqrt{4^{2} }- 4(1)(3) / 2(1)$

$-1 +- \sqrt{16} - 12 / 2$

$-1+- \sqrt{4} /2$

$x_{1}= -1+2 /2\\x_{1} = 1/2\\x_{1} = 0.5$

$x_{2}= -1 -2 /2\\x_{2}= -3 /2\\x_{2}= -1.5$

Comprobación:

$x^{2} + 4x + 3\\x_{1} \\Sustitucion\\1(0.5)+4(0.5)+3\\0.5+2+3\\2.5+3= 5.5$