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Algebra 2

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Combine The Rational Expressions and Simplify (3x-7)/(x^2-12x+27)-(3x-8)/(x^2-9x+18)+(x+2)/(x^2-15x+54)

  • Algebra 2 - ,

    factor first
    (3x-2)/((x-3)(x-9)) - (3x-8)/((x-3)(x-6)) + (x+2)/((x-9)(x-6))
    so the LCD is ((x-3)(x-6)(x-9)

    = [ (3x-2)(x-6) - (3x-8)(x-9) + (x+2)(x-3) ]/[(x-3)(x-6)(x-9)]
    = [3x^2 - 20x + 12 - 3x^2 + 35x - 72 + x^2 - x - 6]/[(x-3)(x-6)(x-9)]
    = (x^2 + 14x -66)/[(x-3)(x-6)(x-9)]

    check my arithmetic

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