Solve this by Completing Square

a^2+6a=8

Pls show the solution clear.

Question

Solve this by Completing Square

a^2+6a=8

Pls show the solution clear.

anonymous · Answer

I'm sorry if i'm wrong, but  you should be simplifying it. So you subtract 6a on both sides. and since the a is squared, you have to find the square root of it. so your answer should be a=(sqrt)8-6a  Again, i'm sorry if i'm not very good at explaining it. Lol

anonymous · Answer

a^2 +6a =8   divide the middle term by 2........... ( 6/2 =3) then square 3^2 =9 add 9 to both sides of the equation........a^2+6a+9=17.......The left hand side is a perfect square and can be factored (a+3)^2=17  now sqrt both sides a+3=+/- sqrt(17)......move the 3 over and you are finished a=-3 +/-  sqrt(17)

anonymous · Answer

it is important to put the +/- in front of anything you square root in this process, this will give you two answers, good luck.

anonymous · Answer

tyvm

anonymous · Answer

a^2+6a =8
a(a+6) =8
a=8 or a=2