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Lv 6
? asked in Science & MathematicsMathematics · 3 years ago

Factorise x^2 + 20x + 99?

8 Answers

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  • ?
    3 years ago

    x^2 +20x + 99

    (x+11)(x+9)

  • Iggy Rocko
    Lv 7
    3 years ago

    x^2 + 20x + 99 =

    (x + 11)(x + 9)

  • Johnathan
    Lv 7
    3 years ago

    (x + 9)(x + 11). Simple enough.

  • Idealist
    Lv 7
    3 years ago

    (x+9)(x+11)

  • Krishnamurthy
    Lv 7
    3 years ago

    (x + 11)(x + 9)

  • ?
    Lv 7
    3 years ago

    x^2 + 20x + 99

    = x^2 + 9x + 11x + 99

    = x(x + 9) + 11(x + 9)

    = (x + 11)(x + 9)

  • lenpol7
    Lv 7
    3 years ago

    (x +9)(x + 11)

  • iceman
    Lv 7
    3 years ago

    x^2 + 20x + 99 => find two numbers that multiply to 99, add to 20? 9, 11:

    = x^2 + 9x + 11x + 99

    = x(x + 9) + 11(x + 9)

    = (x + 9)(x + 11)

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