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11 September, 03:05

Multiply each polynomial

(x + 5) (x+4)

teach me step by step

+2
Answers (1)
  1. 11 September, 05:48
    0
    Answer: x^2 + 9x + 20

    Step-by-step explanation:

    Foil Method: (a + b) (c + d) = ac + ad + bc + bd

    Lets say:

    a = x

    b = 5

    c = x

    d = 4

    Plugging in the numbers: xx + 4x + 5x + 5*4

    Combine like terms:

    xx = x^2

    4x + 5x = 9x

    5 * 4 = 20

    You're then left with: x^2 + 9x + 20
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