Question

Multiply: (x – 4)(x + 5)
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Answer 1

Answer:

${x}^{2} + x - 20$

Step-by-step explanation:

(x-4)(x+5)

= x^2 +5x - 4x -20

$= {x}^{2} + x - 20$

Answer 2

Answer:

x^2 + x - 20

Step-by-step explanation:

(x-4)(x+5)

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

= x^2 + 5x - 4x -20

= x^2 + x - 20

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