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anonymous

  • one year ago

example of an equation in two variables with 0 solutions.

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  1. anonymous
    • one year ago
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    PLEASE HELP

  2. dan815
    • one year ago
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    um

  3. dan815
    • one year ago
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    2x+y=4x+2y+6

  4. dan815
    • one year ago
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    ?

  5. anonymous
    • one year ago
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    Haaha i really don't even know but thank yo, can you help me out with another one

  6. dan815
    • one year ago
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    wait

  7. dan815
    • one year ago
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    ill help u -.-

  8. dan815
    • one year ago
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    u know equation of lines

  9. dan815
    • one year ago
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    y=2x y=2x+1 lets say these 2 equations of lines

  10. anonymous
    • one year ago
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    okay

  11. dan815
    • one year ago
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    can u see the slopes of those 2 liens are the same

  12. anonymous
    • one year ago
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    yea ?

  13. dan815
    • one year ago
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    okay these 2 lines have same slope but different y intercept so they will not intersect, which means no solution

  14. dan815
    • one year ago
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    you can form an equation with these 2 equations put together

  15. anonymous
    • one year ago
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    ohhhhhhhh thats makes sense now

  16. anonymous
    • one year ago
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    so how can i find an equation that has two variable but only one answer >

  17. dan815
    • one year ago
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    y=2x y=2x+1 --------- y-2x=0 y-2x+1=0 ----> multiply this by 2 just for kicks y-2x=0 2y-4x+2 =0 now equation the 2 zero expressions and we get y-2x=2y-4x+2 here have have an equation which we know cannot be satisfied

  18. dan815
    • one year ago
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    okay so similiar to this, now u want to take any 2 lines with different slopes then u know these 2 lines will intersect

  19. dan815
    • one year ago
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    y=2x y=3x but lets rewrite this so we sustain the 2 variables Y-2x=0 y-3x=0 now equation the 0 expressions y-2x=y-3x

  20. dan815
    • one year ago
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    equate*

  21. anonymous
    • one year ago
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    i dont get it ? @dan815

  22. dan815
    • one year ago
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    okay u know 2 lines with different slopes always meet

  23. dan815
    • one year ago
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    |dw:1444028633608:dw|

  24. anonymous
    • one year ago
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    yea

  25. dan815
    • one year ago
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    so take any 2 line equations with different slope

  26. anonymous
    • one year ago
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    and theyll have the same answer ?

  27. dan815
    • one year ago
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    yeah but re arragen it so u still have the 2 variables

  28. dan815
    • one year ago
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    i was thinking uhh.. what grade are u in... have u learnt parabolas

  29. anonymous
    • one year ago
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    im so confused

  30. dan815
    • one year ago
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    because u can do this with parabolas too

  31. dan815
    • one year ago
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    |dw:1444028777898:dw|

  32. anonymous
    • one year ago
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    i dont rememebr to much about them

  33. dan815
    • one year ago
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    ok nvm

  34. anonymous
    • one year ago
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    can you exaplain it to me again cause im really confused

  35. dan815
    • one year ago
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    ya so take 2 line equations with different slope

  36. dan815
    • one year ago
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    y=2x y=3x

  37. dan815
    • one year ago
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    now you put these together so that u still have 2 variables in your expression

  38. dan815
    • one year ago
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    y-2x=0 y-3x=0 rewrite both equation like above now equate the 0 s together 0=0 y-2x=y-3x

  39. dan815
    • one year ago
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    there you have an equation with 2 variables that can only have 1 solution

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