mirandasalazar1234 mirandasalazar1234
  • 07-02-2020
  • Mathematics
contestada

what are the solutions of the equation
3x^2+15x =18

Respuesta :

Branta Branta
  • 08-02-2020

Answer:

1,-6

Step-by-step explanation:

Given quadratic equation is [tex]\[3x^{2}+15x=18\][/tex]

This can be represented as  [tex]\[3x^{2}+15x-18=0\][/tex]

This is of the form  [tex]\[ax^{2}+bx+c=0\][/tex]

where a=3,b=15 and c = -18

The roots of this equation are given by:

[tex]\[\frac{-15\pm \sqrt{15^{2}-4*3*(-18)}}{2*3}\][/tex]

= [tex]\[\frac{-15\pm \sqrt{225+216}}{6}\][/tex]

= [tex]\[\frac{-15\pm \sqrt{441}}{6}\][/tex]

= [tex]\[\frac{-15\pm 21}{6}\][/tex]

= 1, -6

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