Question

Multiply : (x - 4)(x + 5)​

Answer 1

Answer:

= (x – 4)(x + 5).

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

= x² + 5x – 4x – 20.

= x² + x - 20

Answer 2

Answer:

$(x - 4)(x + 5) \\ x(x + 5) - 4(x + 5) \\ {x}^{2} + 5x - 4x - 20 \\ {x }^{2} + x - 20$

Hope it helps you