algebra

posted by .

complete the square for the equation

x^2-3x+____

how do I figure out what goes there

• algebra -

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 -

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 -

Yea..I remembered now. Thanks 4 correcting !

Similar Questions

1. Algebra 1

how do i graph x + y = 1 put y on one side y=-x+1 im doing an online test and its asking me to find the equation that matches the graph. But im not sure how to figure it out. well the graph should have a negative slope with 1 as y-intercept …
2. math

List terms that complete a possible pattern in each of the following. 7,8,15,23,38 ____, ____, _____ I can not figure this out.
3. Math - Magic Square???

My daughter is in 2nd grade and has a worksheet called Magic 26. It wants her to use the numbers 1 -12. Each row, column, and diagonal must equal 26. The four corners and four center numbers must equal 26 too. (example of puzzle below) …
4. Spanish 1

A spanish exchange student is trying to figure out what his friends like to eat. Provide the correct pronoun forms to complete his sentences below.: ____ gusta la comida china. A Patricia y a Juan ____ gusta la comida mexicana. ¿A …
5. Math

Hello. I am trying to help out my sister and find patterns in numbers.... Ex/ 1+2 2+2 3+2 4+2 My question is... I can't figure out what the pattern is in the following set... 1 goes to 4 2 goes to 7 3 goes to 10 and 4 goes to 13...... …
6. math

Write the first six terms of each of the sequences whose nth term is a)(-3)n { ____, ____, ____, ____ , ____, ____ } b)3 – 4n { ____, ____, ____, ____ , ____, ____ }
7. Algebra

Complete the square to form a perfect square trinomial. X^2+4x+____ How do I do this?
8. Spanish 2

I am writing things that I do on the ship. Choose the correct verb (based on its meaning) to complete each sentence. A. Taco B. Nado C. Almuerzo D. Juego E. Escucho F. Miro. G. Abro H. Hablo I. Voy J. Como 1. ____ la musica. 2. ____ …
9. Algebra

Which of the following statements is true?
10. Math

If h is hours and n is the number of radios remaining, complete the equation: n= ____ x h = ____

More Similar Questions