Question

6. Multiply: (x – 4)(x + 5)

(a) x2 + 5x - 20,

(b) x2 - 4x - 20,

(c) x2 - x - 20,

(d) x2 + x - 20.

Answer 1

(x – 4)(x + 5).

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

= x2 + 5x – 4x – 20.

= x2 + x - 20.

Answer: (d)

Answer 2

Heya ,here

solution =

multiple ;

=> (x - 4)(x +5)
=> x ( x + 5 ) -4 ( x +5)
=> x^2+5x -4x + 20
=> x^2 + x -20

so, the option D is correct ✔
Hope it's helps you.
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