Sovi.AI - AI Math Tutor

Scan to solve math questions

QUESTION IMAGE

so the two solutions are... (select both answers) 8x² + 14x + 5 = 0 -5/…

Question

so the two solutions are... (select both answers) 8x² + 14x + 5 = 0 -5/4 1/2 5/4 20/16 8/16 -1/2 no solution ©2020 shore mathletics

Explanation:

Step1: Usar fórmula cuadrática

La fórmula para resolver \( ax^2 + bx + c = 0 \) es \( x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \). Aquí, \( a = 8 \), \( b = 14 \), \( c = 5 \).

Step2: Calcular discriminante

\( D = b^2 - 4ac = 14^2 - 4(8)(5) = 196 - 160 = 36 \).

Step3: Calcular raíces

\( x = \frac{-14 \pm \sqrt{36}}{2(8)} = \frac{-14 \pm 6}{16} \).
Para \( + \): \( x = \frac{-14 + 6}{16} = \frac{-8}{16} = \frac{-1}{2} \).
Para \( - \): \( x = \frac{-14 - 6}{16} = \frac{-20}{16} = \frac{-5}{4} \).

Answer:

\(\boldsymbol{\frac{-5}{4}}\) y \(\boldsymbol{\frac{-1}{2}}\) (o \(\frac{-5}{4}\) y \(\frac{-1}{2}\) en las opciones dadas)