Question

Solve by completing the square:
x^2+6x=12

Answer 1

add both sides (6/2)^2 i.e., 9 and complete

Answer 2

did you get what surjithayer suggested?

Answer 3

yes?
no?
maybe?
no the foggiest?
sorry was busy watching spongebob?
just had an ice-cream headache?

Answer 4

Uh... not really..

Answer 5

x^2 + 2ax + a^2 = (x + a)^2

that is what you want to do, make it so you can do that.
you have
x^2 + 6x + ...

2a = 6 in this case

to get the 'a^2' value to add on, you have to take half of that 6, a=3, then square that a^2=9

Answer 6

x^2 + 6x + 9 -----> (x+3)^2


make sure you also add 9 to the other side, to not screw up the equality

Answer 7

The overall thing to remember in the case where you have

x^2 + ax

take half of that 'a' value, and square it, add it to both sides of equation...

Answer 8

try
complete the square

x^2 + 20x = 7

Answer 9

I uh.. am still trying to do this one hehe @DanJS

Answer 10

I think I got the first one!!
Is it..
x^2+6x+9=x+9
?

Answer 11

x^2 + 6x =12

half the a term and square it... 6/2 = 3 , 3^2 = 9, add to both sides

x^2 + 6x + 9 = 12 + 9

makes it able to be a square

(x + 3)(x+3) = (x+3)^2 = 21

Answer 12

yep

Answer 13

YAY! thank you so much! That helped a lot!!
I will keep this in my notes... @DanJS

Answer 14

what is

x^2 + 20x = 7

as a coimpleted square?