Question

[8.03] What are the factors of x2 − 6x − 40?

(x + 8)(x − 5)

(x + 5)(x − 8)

(x − 10)(x + 4)

(x − 4)(x + 10)

Answer 1

you are correct

Answer 2

what two numbers can you multiply and give you -40

but when you add them give you -6?

Answer 3

x^2-6x-40=x^2-10x+4x-40
x(x-10)+4(x-10)
(x-10)(x+4)
hence option 3

Answer 4

option 3