Question

What number must you add to complete the square?
x^2+4x=3

Answer 1

add 4

Answer 2

x^2+4x-3=0

Answer 3

So it would be -3?

Answer 4

Yep.

Answer 5

I think so.

Answer 6

Well you could use the quadratic formula, \[-b \pm \sqrt{b ^{2}-4ac}\div2a\], where the equation is in the form ax^2 + bx + c =0, but completing the square is quicker in this case.

Answer 7

I keep getting a Decimal.

Answer 8

http://blogs.discovermagazine.com/loom/files/2008/07/quadratic.jpg Quad formula
a:1
b:4
c:-3

Answer 9

4/2 = 2
2^2 = 4

Answer 10

So 2^2 = 4 and the answer is 4,Correct?

Answer 11

yeah

Answer 12

The answer to the question is not 4, but 4 is the number added to the equation. Here are step by step instructions for completing squares: http://www.purplemath.com/modules/sqrquad.htm

Answer 13

There should be two answers to the equation.

Answer 14

there is