Question

x+6=sqaure root 18+3x+x^2

Answer 1

\[x+6=\sqrt{18+3x+x ^{2}}\]

Answer 2

solve the equation for x. if necessary round your answer to two decimal places.

Answer 3

I would square both sides

Answer 4

Rearrange the equation \[\sqrt{x^2 +3x+18} = x+6\] Square both sides\[x^2 +3x+18 = (x+6)^2\]\[x^2 +3x+18 = x^2 + 12x + 36\] Can you do the rest?

Answer 5

i just put them into factors right?

Answer 6

in this case, first combine *like terms*

Answer 7

Like what "phi" said, combine the like terms. Here, the x squared cancel each other out. \[x^2 - x^2 = 0\]

Answer 8

ok one moment

Answer 9

x=-2 ?

Answer 10

Correct!

Answer 11

yes, but whenever you get this type of problem check that the answer works in the original equation (sometimes it won't!)

Answer 12

ok, thanks guys!

Answer 13

No problem :)