Question

Will Medal!
What are the factored forms of the following expressions?
1. d^2+12+32
a. (d+8)(d+4)
b. (d-8)(d-4)
c. (d-8)(d+4)
d. (d+8)(d-4)

2. d^2-12d+32
a. (d-4)(d-8)
b. (d-4)(d+8)
c. (d+4)(d-8)
d. (d+4)(d+8)

3. x^2-x-42
a. (x-7)(x+6)
b. (x+7)(x+6)
c. (x+7)(x-6)
d. (x-7)(x-6)

4. d^2-18d+80
a. (d-8)(d+10)
b. (d+8)(d+10)
c. (d-8)(d-10)
d. (d+8)(d-10)

5. x^2+3xy-4y^2
a. (x+4y)(x+y)
b. (x-4y)(x-y)
c. (x-4y)(x+y)
d. (x+4y)(x-y)

Answer 1

1-A
2-A
3-A
4-c
and i can't figure out number 5

Answer 2

Thank you!

Answer 3

welcome