xxgissellexx
xxgissellexx xxgissellexx
  • 13-03-2019
  • Mathematics
contestada

i need help,how do you solve this?
[tex]3 {x}^{2} + 2x - 5[/tex]
​

Respuesta :

MrsStrong
MrsStrong MrsStrong
  • 17-03-2019

Answer:

x = 1, -5/3

Step-by-step explanation:

To solve the quadratic, use the quadratic formula:

[tex]\frac{-b+/-\sqrt{b^2-4ac} }{2a}[/tex]

Here a=3, b=2 and c=-5.

[tex]w=\frac{-b+/-\sqrt{b^2-4ac} }{2a} \\w=\frac{-2+/-\sqrt{2^2-4(3)(-5)} }{2(3)} \\w=\frac{-2+/-\sqrt{4+60} }{6} \\w=\frac{-2+/-\sqrt{64} }{6} \\w=\frac{-2+/-8 }{6} \\w=\frac{-2+8 }{6}=\frac{6}{6}=1 \\and\\w=\frac{-2-8 }{6} =\frac{-10}{6}=-\frac{5}{3}[/tex]

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