Question

solve 2a/a+12=2/a-8

Answer 1

Cross multiplication to the rescue.

Answer 2

2a/a+12.2/a-8

Answer 3

??

Answer 4

how to cross multiply

Answer 5

\[\LARGE \frac{2a}{a+12}=\frac{2}{a-8}\]
\[\LARGE 2a(a-8)=2(a+12)\]
solve now

Answer 6

2a^2-8=2a+12

Answer 7

wrong.

Answer 8

\[\Huge 2a^2-16a=2a+24\]

Answer 9

Okay...I guess I should collect the like terms now

Answer 10

yo

Answer 11

2a^2-16a+2a+24

Answer 12

man you have messed up everything

Answer 13

\[\Huge 2a^2-16a-2a-24=0\]

Answer 14

\[\Huge 2a^2-18a-24=0\]
\[\Huge 2(a^2-9a-12)=0\]

Answer 15

Divide by 2 on both the sides to get \[\LARGE a^2-9a-24=0\]
can you factor out atleast?

Answer 16

can figure out two number that can give a product of -24 and sum of -9

Answer 17

(a- )(a+ )

Answer 18

If not,then use the standard formula.
\[\LARGE a= \frac{-(-9) \pm \sqrt {81-4(1)(-24)}}{2(1)}\]

Answer 19

you know this formula right?

Answer 20

yes

Answer 21

so try solving now

Answer 22

Quadratic formula

Answer 23

\[9\pm \sqrt{177}/2\]

Answer 24

yep.

Answer 25

11.15, -2.15

Answer 26

looks great.

Answer 27

Okay