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ricki010
ricki010 ricki010
  • 28-08-2014
  • Mathematics
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find all real solutions:

find all real solutions: class=

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konrad509
konrad509 konrad509
  • 28-08-2014

\(\frac{1}{x-1}+\frac{1}{x+2}=\frac{5}{4}|\cdot4(x-1)(x+2)\\ D:x ot=1 \wedge x ot=-2\\ 4(x+2)+4(x-1)=5(x-1)(x+2)\\ 4x+8+4x-4=5(x^2+2x-x-2)\\ 8x+4=5x^2+5x-10\\ 5x^2-3x-14=0\\ 5x^2-10x+7x-14=0\\ 5x(x-2)+7(x-2)=0\\ (5x+7)(x-2)=0\\ x=-\frac{7}{5}\vee x=2\)

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