Kevinbollinger2005
Kevinbollinger2005 Kevinbollinger2005
  • 23-09-2020
  • Mathematics
contestada

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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PaniniHead
PaniniHead PaniniHead
  • 23-09-2020

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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