Question

Multiply: (x – 4)(x + 5).



x^2 + 5x - 20,

x^2 - 4x - 20,

x^2 - x - 20,

x^2 + x - 20.​

Answer 1

Answer:

(x_4)(x+5)

here we use the property

(x_a)(x+b)

now,

x^2+(5-4)x -4*5

x^2+1*x -20

x^2+x -20