Question

How to solve:

log(x+2) + log(x-1) = 1

Answer 1

Hint: loga + logb = log(a/b)

Answer 2

Does it help?

Answer 3

Hmm give me a sec

Answer 4

Not really :$ the answer is 3 and that just gives me a quadratic formula

Answer 5

Are they base 10?

Answer 6

yes

Answer 7

I assume

Answer 8

1=log10

Answer 9

So, log(x+2) + log(x-1) = 1
log{(x+2)(x-1)} = log10

Answer 10

That may help

Answer 11

Do you know what to do when both 2 sides have the same base?

Answer 12

I don't think so (chlorophyll)

Answer 13

So learn the rule, both logs will be CANCELLED out :)

Answer 14

really? okay, but then I'm still confused :$

Answer 15

okay, so it would still be (x+2)(x-1) = 10

Answer 16

x^2 +x -2 = 10

Answer 17

or x^2+x-12 actually

Answer 18

=0

Answer 19

... solve the quadratic equation?

Answer 20

and then is the positive root just my answer?

Answer 21

Perfect! I'm waiting for your x = ...?

Answer 22

3

Answer 23

Wow, why's so fast!
Hmm...

Answer 24

Anyway, correct!

Answer 25

Questions?

Answer 26

um no thanks :) will try that with the next question now!