Question

log(w-3)+log(w)=log(28)

log is in base 10

Answer 1

solve for w

Answer 2

log a +log b= log (ab)

Answer 3

log (w-3)+log w= log ((w-3)w)=log28
therefore w(w-3)=28...can you solve this?

Answer 4

quadratic formula?

Answer 5

w^2-3w-28=0

Answer 6

yes solve it

Answer 7

so its 7 and not -4 right?

Answer 8

w^2-7w+4w-28=0

Answer 9

what? where do you get 7w and 4w?

Answer 10

yes it's 7...coz for negative number log is not defined

Answer 11

@Ldaniel clear?

Answer 12

no

Answer 13

why ?

Answer 14

oh wait cause 7-4 =3

Answer 15

yes i split -7w+4w=-3w