Posted by **chelsea** on Monday, February 25, 2008 at 9:25pm.

complete the square for the equation

x^2-3x+____

how do I figure out what goes there

- algebra -
**^Quen^**, Monday, February 25, 2008 at 11:25pm
well..I can't remember the formular for that one. But, you could figure it out by looking at equation.

x^2-3x+(?)

if you have to factor the equation, it will be like this: (x- ?) (x-?)

Because of the middle number is -3x and the (?) is positive, it has to be (-) something * (-) something. When you add those two, you have to get -3x. IF you multiply them, you 'll get positve (+) number.

So,

(x-2) (x-1)= x^2-x-2x+2

=x^2-3x+2

- algebra -
**Reiny**, Tuesday, February 26, 2008 at 12:06am
Sorry, but that is not correct

The question was to complete the square, so the first and last terms have to be perfect squares.

in general if the expression starts with 1x^2, take onehalf of the middle term coefficient and square that.

so 3/2 squared is 9/4

then x^2-3x+9/4 = (x-3/2)^2

- algebra -
**^Quen^**, Tuesday, February 26, 2008 at 4:45pm
Yea..I remembered now. Thanks 4 correcting !

## Answer this Question

## Related Questions

- math - List terms that complete a possible pattern in each of the following. 7,8...
- Spanish 1 - A spanish exchange student is trying to figure out what his friends ...
- Algebra - Complete the square to form a perfect square trinomial. X^2+4x+____ ...
- Math - Hello. I am trying to help out my sister and find patterns in numbers...
- Algebra - Which of the following statements is true? A. Any quadratic equation ...
- Spanish 2 - I am writing things that I do on the ship. Choose the correct verb (...
- Math - Magic Square??? - My daughter is in 2nd grade and has a worksheet called ...
- Algebra 1 - how do i graph x + y = 1 put y on one side y=-x+1 im doing an online...
- math - Write the first six terms of each of the sequences whose nth term is a)(-...
- Math - Complete the table of values for the function y = 4(1^x/2)^x: x -3 -2 -1 ...