victoriasanchez2
victoriasanchez2 victoriasanchez2
  • 24-06-2017
  • Mathematics
contestada

If the solutions to an equation are 2 and –3, which of the following could be the equation?
A. x^2-x-6=0
B. 3x – 6 = 0
C. 3x^2-15x+18=0
D. 2x^2+2x=12


Respuesta :

tomthegreatest
tomthegreatest tomthegreatest
  • 24-06-2017
the solutions are 2 and -3 which means a factored equation would be (x-2)(x+3)
simplify it and you get A
Answer Link
WojtekR
WojtekR WojtekR
  • 24-06-2017
The solutions are 2 and -3 so we can write our equation as:

[tex]a\cdot(x-2)(x+3)=0\\\\a\cdot(x^2-2x+3x-6)=0\\\\a\cdot(x^2+x-6)=0\\\\ax^2+ax-a\cdot6=0[/tex]

and for a = 2 there will be:

[tex]ax^2+ax-a\cdot6=0\\\\ 2x^2+2x-2\cdot6=0\\\\ 2x^2+2x-12=0\quad|+12\\\\\boxed{2x^2+2x=12}[/tex]

Answer D.
Answer Link

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