imanij imanij
  • 13-09-2017
  • Mathematics
contestada

What is 8x over 3 minus X over 2 equals -13 ?

Respuesta :

alexzyv
alexzyv alexzyv
  • 15-09-2017
x^2-5x=12
2x^2-5x-12=0
2*-12=-24; The two factors of -24 whose sum is -5 are -8 and +3.
2x^2+3x-8x-12=0
x(2x+3)-4(2x+3)=0
(x-4)(2x+3)=0
x=4, 
2x=-3, x=-3/2
.

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