kun214 kun214
  • 03-10-2018
  • Mathematics
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How to do 43 ?
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How to do 43 Thank you class=

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quynhgiao911516nan quynhgiao911516nan
  • 03-10-2018

[tex]2 {x}^{3} - 5 {x}^{2} + x + 2 = 0[/tex]
[tex]2 {x}^{3} - 4 {x}^{2} - {x}^{2} + 2x - x + 2 = 0[/tex]
[tex]2 {x}^{2} (x - 2) - x(x - 2) - (x - 2) = 0[/tex]
[tex](x - 2)(2 {x}^{2} - x - 1) = 0[/tex]
[tex](x - 2)(2 {x}^{2} - 2x + x - 1) = 0[/tex]
[tex](x - 2)(x - 1)(2x + 1) = 0 [/tex]
[tex]x = 2[/tex]
[tex]x = 1[/tex]
[tex]x = - 0.5[/tex]
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