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dddan

how do i factor 2x^2-5x+3?

  • one year ago
  • one year ago

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  1. completeidiot
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    are you familiar with ,factoring by grouping?

    • one year ago
  2. dddan
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    yes but there are only 3 numbers.....

    • one year ago
  3. completeidiot
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    well, look at the middle number, can you seperate that into 2 numbers that would allow you to factor by grouping?

    • one year ago
  4. completeidiot
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    examples -5x=-2x+-3x -5x=-4x+-1x -5x=-6x+ 1x -5x= 6x + -1x

    • one year ago
  5. estudier
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    (2x )(x ) and it has to be 3 and 1 if it's an easy factorization

    • one year ago
  6. dddan
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    thanks also how do you factor 2x^2+7x-15

    • one year ago
  7. Husnul_Aini
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    You can use this formula: \[x _{1,2} = \frac{ -b \pm \sqrt{b ^{2} - 4ac} }{ 2a }\] where a = 2, b = -5, c =3

    • one year ago
  8. Husnul_Aini
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    The value of a,b and c, you can get from the equation \[ax ^{2}+bx+c\] You can solve the various forms of equations with ease.

    • one year ago
  9. estudier
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    This is just another of same (2x )(x ) and your 15 breaks out into 5 and 3

    • one year ago
  10. dddan
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    ya but they dont add to 7 right?......

    • one year ago
  11. estudier
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    depends on the sign and where you put each one....

    • one year ago
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