Question

For all numbers c and d, let [] be defined by the following equation
c [] d = d^2 +cd - c
if 3 [] g = 25, what is the positive value of g?

Answer 1

g=4

Answer 2

why?

Answer 3

really?

Answer 4

i guess because where you see a "c"you put 3 and where you see d you put g

Answer 5

\[3[]g=g^2+3g-3=25\]

Answer 6

(g+7)(g-4)=0
g=-7, g=4
g=4 is the only positive solution

Answer 7

\[g^2+3g-28=0\]
\[(g-4)(g+7)=0\]
\[g=4\] or
\[g=-7\]

Answer 8

had to beat me didn't you but doesn't count because you didn't use latex nyah nyah

Answer 9

yes it does
its readable so it counts

Answer 10

Lol thank you guys for explaining.

Answer 11

satellite did all the explaining

Answer 12

ok you win. now get some sleep. i mean i am going to get some sleep . really. now.