Question

Identify the factors of 6ab − 8a + 21b − 28.

(2a + 4)(3b − 7)
(2a − 4)(3b + 7)
(2a + 7)(3b − 4)
(2a − 7)(3b + 4)

Answer 1

do you want to work forward or backwards?

Answer 2

factor by grouping

Answer 3

it does not matter and i beleive the asnwer is c but im not sure for htis one

Answer 4

yep, you can mult out or factor by grouping like @welshfella suggested

Answer 5

mult out ans c to get expression

Answer 6

6ab − 8a + 21b − 28
= 2a(3b - 4) + 7(3b - 4)

Answer 7

now take out the common factor 3b - 4

Answer 8

ok

Answer 9

what should i do nexT?

Answer 10

well 3b-4 is one of the factors and the other is what is left outside the parentheses