Question

Complete the square to solve for x.

x^2+4x−21=0

Answer 1

(x+7) (x-4) is factored

x=-7 and/or x=4

Answer 2

You should actually show them how you got that

Answer 3

Not just give them the answers, the back of the book can do that for them

Answer 4

i got the answers and know how to do them, i just want to make sure they are right.

Answer 5

ah, well that saves me a bit of typing

Answer 6

Oh, that's better :), next time please clarify that

Answer 7

yess, homework assignment on khan acdemy