Question

Solve the equation by completing the square. round to the nearest hundredth if necessary.

x^2 + 2x = 3

Answer 1

what is half of 2?

Answer 2

1.5 @satellite73

Answer 3

?

Answer 4

\[
(x+d)^2=x^2+2dx+d^2
\]

Answer 5

half of two?

Answer 6

\[
2d=2
\]

Answer 7

the half of 2 is 1 sorry

Answer 8

you dont have to complete the square
(x-1)(x+3)

Answer 9

ok then start with
\[(x+1)2=3+?\] now we fill in the ?
what is one squared?

Answer 10

one squared is 1

Answer 11

ok so we go to
\[(x+1)^2=3+1\] or \[(x+1)^2=4\]

Answer 12

then taking the square root, we get \[x+1=-2\] or \[x+1=2\] solve the first one, get \[x=-3\]and the second gives \[x=1\]

Answer 13

ok i got that

Answer 14

but is that the complete answer?

Answer 15

@satellite73