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anonymous

  • one year ago

ALGEBRA 2 ----------------------------------------***WILL BECOME FAN AND GIVE MEDAL*** Solve the following system of equations and show all work. y = −x2 + 4 y = 2x + 1

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  1. Plasmataco
    • one year ago
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    -x squared?

  2. anonymous
    • one year ago
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    yeah

  3. Plasmataco
    • one year ago
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    oh.

  4. Plasmataco
    • one year ago
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    substitute.

  5. anonymous
    • one year ago
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    just need the steps

  6. Plasmataco
    • one year ago
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    replace the bottem equations with Y on the top equation.

  7. Plasmataco
    • one year ago
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    add X^2 and subtract 4 from both sides to get X^2+2x-3

  8. anonymous
    • one year ago
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    alright got that

  9. Plasmataco
    • one year ago
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    the simplify to get (X-1)(X+3)

  10. Plasmataco
    • one year ago
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    X can be either 1 or -3.

  11. Plasmataco
    • one year ago
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    now, sub it in.

  12. anonymous
    • one year ago
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    x^2 + 3x -x -3

  13. Plasmataco
    • one year ago
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    yup

  14. Plasmataco
    • one year ago
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    you got it.

  15. anonymous
    • one year ago
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    so that's the answer?

  16. Plasmataco
    • one year ago
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    no.

  17. Plasmataco
    • one year ago
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    simplify it to (X-1)(X+3)

  18. Plasmataco
    • one year ago
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    then, for (X-1)(X+3)=0, X could be 1 or negative 3.

  19. anonymous
    • one year ago
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    x^2 + 3x -x - 3 x^2 + 2x -3

  20. Plasmataco
    • one year ago
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    sub it in so Y=2X+1, X=1, Y=3. (1,3) when X=-3 Y=5 so (-3,5)

  21. Plasmataco
    • one year ago
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    nononono

  22. Plasmataco
    • one year ago
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    don't multiply both of them.

  23. Plasmataco
    • one year ago
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    make separate equations like X-1=0 and X+3=0

  24. Plasmataco
    • one year ago
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    then, look up to see the rest.

  25. Plasmataco
    • one year ago
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    I'm 13 XD

  26. anonymous
    • one year ago
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    nice

  27. Plasmataco
    • one year ago
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    well, get it?

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