Multiply: (x – 4)(x + 5) (a) x2 + 5x – 20, (b) x2 – 4x – 20, (c) x2 – x – 20, (d) x2 + x – 2

Question

Multiply: (x – 4)(x + 5)

(a) x2 + 5x – 20,

(b) x2 – 4x – 20,

(c) x2 – x – 20,

(d) x2 + x – 20.

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Yến Oanh 2 months 2021-08-02T09:40:33+00:00 1 Answers 3 views 0

Answers ( )

    0
    2021-08-02T09:41:44+00:00

    Answer:

    D.  x2 + x – 20.

    Step-by-step explanation:

    (x – 4)(x + 5).

    = x(x + 5) -4(x + 5).

    = x2 + 5x – 4x – 20.

    = x2 + x – 20.

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