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30 April, 21:47

The product of 2x-3 and x+4 can be expressed as what

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Answers (2)
  1. 30 April, 21:57
    0
    (2x - 3) * (x+4) =

    2x*x + 2x*4 - 3*x - 3*4 =

    2x^2 + 8x - 3x - 12 =

    2x^2 + 5X - 12 =

    a = 2; b = 5, c = - 12

    Δ = b^2 - 4. a. c

    Δ = 5^2 - 4.2. (-12)

    Δ = 25 - 8. (-12)

    Δ = 25 + 96

    Δ = 121

    x = - b±√Δ / 2. a

    x = - 5±√121 / 2.2

    x = - 5±11 / 4

    x' = - 5-11 / 4 = - 16/4 = > x' = - 4

    x" = - 5+11 / 4 = 6/4 (:2) = > x" = 3/2
  2. 30 April, 22:14
    0
    Hope it cleared your doubt.
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