Answer:
3
Explanation:
subtract the 3 from both sides
add 4 to each side
x^2+4x=3
To complete the square, take the coefficient of the x term
4
divide by 2
4/2=2
Then square it
2^2
Add 4 to each side
x^2+4x+4=3+4
x^2 +4x+4 =7
4.9m questions
6.4m answers