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Bubblez33 Group Title

Solving quadratics by factoring, solve equaton -20x^2+14=-27x

  • one year ago
  • one year ago

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  1. gaara438125 Group Title
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    first add 27x to each side -20x^2 +27x + 14 = 0

    • one year ago
  2. Bubblez33 Group Title
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    -7x^2+1=0

    • one year ago
  3. gaara438125 Group Title
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    oh no, you can't subtract -20x^2 and 27x one is x to the second power

    • one year ago
  4. Bubblez33 Group Title
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    -20x^2-13x=0

    • one year ago
  5. gaara438125 Group Title
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    it's -20x^2 + 27x + 14 = 0 the 27 has a variable of x which we don't know what is so we can't add or subtract with it unless another number has the same variable

    • one year ago
  6. Bubblez33 Group Title
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    this algbra is confusing

    • one year ago
  7. gaara438125 Group Title
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    ok, so if your adding or subtracting with a variable you need to have the same variable, but if your multiply or dividing it doesn't matter.

    • one year ago
  8. Bubblez33 Group Title
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    Thanks for ur help

    • one year ago
  9. gaara438125 Group Title
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    ok well we have -20x^2 +27x + 14 = 0 and ima pass it to @JakeV8 mainly because i forget this part, and i need sleep lol

    • one year ago
  10. Bubblez33 Group Title
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    ok, thanks

    • one year ago
  11. Bubblez33 Group Title
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    ok Jake from here i need to find the smaller value & the larger value

    • one year ago
  12. JakeV8 Group Title
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    Sorry, I got kicked off the site and lost everything I had typed. This doesn't factor into something easy with integer values... -20x^2 +27x + 14 = 0 you can divide it all through by -20 to get: x^2 - (27/20)x + (14/20) = 0 But in my opinion, that's not much better. The solutions are x = -8/20 and x = 35/20 which both reduce to x = -2/5 and x = 7/4 that means you could have factored it as: (x + 2/5)(x - 7/4) = 0 If you can see how to easily get from the original quadratic equation to this factored form, then great. Personally, it doesn't seem easy or obvious to me, and if the problem hadn't stated to solve by factoring, I would have used the quadratic formula to get the solutions for x.

    • one year ago
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