Question

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

find two numbers that add to make the coefficient of x and multiply to make the constant,
so add to (-6) and multiply to (-40)

Answer 2

is it d

Answer 3

no, it is C, (-10) + 4 will give you -6,
D gives you a positive 6, try expanding the brackets with FOIL if you arent sure

Answer 4

so its c

Answer 5

thank you