Question

Factor.
2y(4a + b) − (b + 4a)

Answer 1

@alekos i got (2y+1)(b+4a)

Answer 2

Nice try. Its actually (2y-1)(b+4a)

Answer 3

why is it minus?

Answer 4

because the second term is - (b+4a)

Answer 5

oh i thought we changed it to plus when we change the variable around to match

Answer 6

No, you must carry through the minus

Answer 7

can i show you what i mean .
this person had factor.
c(a-2) -b(2-a) and got c(a-2) + b(a-2)

Answer 8

the got (a-2) and c+b)

Answer 9

it it because there was a b there?

Answer 10

no its because -b(2-a) was changed to +b(a-2)

Answer 11

can i ask why it was changed like what is the rule?

Answer 12

oh ok. -b(2-a) = (-1)b(2-a) = b(-1)(2-a) = b[(2)(-1)-a(-1)] = b(-2+a) = b(a-2)

Answer 13

can you follow that?

Answer 14

ummm lol

Answer 15

that ok?

Answer 16

can you put it in words like there is a - infront of parenthesis we keep the negative sign

Answer 17

I'll let someone else give it to you in words