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anonymous

  • one year ago

Solve 2x^2 - 20 = 3x.

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  1. anonymous
    • one year ago
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    THere are many ways my prefer way is to use quadratic formula. Depending on what they want u to use tho they may not like it. BUT 2x2 - 20 = 3x 2x2 - 20 - 3x=0 just subtract 3x from both sides. 2x2 - 3x -20 =0 rearrange now use quadratic equation ax2 + bx +c =0 2x2 - 3x -20

  2. anonymous
    • one year ago
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    I mean use quadratic formula

  3. anonymous
    • one year ago
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    https://gfbrandenburg.files.wordpress.com/2011/09/quadratic-formula.jpg

  4. anonymous
    • one year ago
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    2 is a -3 is b -20 is c Can you handle that :)

  5. anonymous
    • one year ago
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    \[2x^{2}-20=3x\]

  6. anonymous
    • one year ago
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    \[2x ^{2}-3x-20=0\]

  7. anonymous
    • one year ago
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    \[2x ^{2}-8x+5x-20=0\]

  8. anonymous
    • one year ago
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    \[2x(x-4)+5(x-4)=0\] \[\therefore (2x+5)(x-4)=0 \rightarrow x=-2.5 or 4\]

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