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Algebra

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Use substitution to determine whether the ordered pair (–2, –3) is a solution of the equation x2 – y = 7. Show some work. Be sure to state your conclusion about whether the ordered pair is a solution or not.

  • Algebra -

    I assume you meant x^2 - y = 7

    let's sub in the given point

    Left Side = (-2)^2 - (-3)
    = 4 + 3
    = 7

    Right Side = 7

    Mmmhh, what do you think?

  • Algebra -

    I think that makes sense, although I used 2 computer based calculators that told me the solution was -1. So the annswer is 7 and solution is a true statement.

  • Algebra -

    - (-3) = + 3
    I think you probably told the calculator 4 - 3 = 1 but it is 4 -(-3) = 4+3 = 7

  • Algebra -

    Got it! Thanks!

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