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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Answer 1

x – 4)(x + 5).

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

= x2 + 5x – 4x – 20.

= x2 + x - 20.

Answer 2

hey friend your answer

x(x+5)-4(x+5)

x^2+5x-4x-20

x^2+x-20

d) x^2+x-20