Algebra

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Please perform the indicated operations and simplify

(3x-5)^2-(2x+1)(x-4)

  • Algebra -

    (3x-5)^2-(2x+1)(x-4)
    use FOIL to expand each one

    = 9x^2 - 30x + 25 - (2x^2 - 8x + x - 4)

    now simplify

  • Algebra -

    Yes but doesn't -8x and x combine to become -7x? so then it should look like this?

    -2x^2 -7x -4?

  • Algebra -

    of course ...
    that is what I meant by simplify.

    I was expecting you to finish the question.

    can you tell me what the next few lines would be ?

  • Algebra -

    9x2-30x+25
    -2x2 -7x -4
    --------------
    7x2 -23+29
    Is this correct?

  • Algebra -

    Thanks Breanna! Looks correct to me!

  • Algebra -

    Perform the indicated operations and simplify (2x - 6) (x + 1) - (x - 7)^2

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