Question

Me ajudem a armar a conta e resolver,por favooor preciso urgente

Answer 1

Resposta:

x' = -2

x" = -8

Explicação passo a passo:

x² + 10x + 16 = 0

a = 1, b = 10, c = 16

delta = b² -4.a.c

delta = 10² - 4. 1. 16

delta = 100 - 64

delta = 36

x = ( -b +- raiz(36)) / 2.a

x = (- 10 +- 6)/ 2

x' = (-10 +6)/2 = -4/2 = -2

x" = (-10 -6)/2 = -16/2 = -8

Answer 2

Resposta:

x=-2, x =-8

Explicação passo a passo:

$x^2+10x+16=0\\x=\frac{-10\pm \sqrt{10^2-4\cdot \:1\cdot \:16}}{2\cdot \:1}\\\\x=\frac{-10\pm \sqrt{10^2-64}}{2\cdot \:1}$

$x=-10\pm\frac{\sqrt{100-64} }{2}$

$x= -10\pm\frac{\sqrt{36} }{2}$

$x_1=\frac{-10+6}{2\cdot \:1}$=$\frac{-4}{2}= -2$

$x_2=\frac{-10-6}{2\cdot \:1}=\frac{-16}{2}$=-8