Question

x^2 + 3x - 28 = 0

Answer 1

please answer this!

Answer 2

Factor it first.

Answer 3

my math teacher said not to factor first :/

Answer 4

Have you learned the quadratic formula?

Answer 5

yeaa

Answer 6

\[x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}\]
In this case a =1 , b = 3 and c = -28

Answer 7

like i no how to get this far.
x^2 + 3x = 28 and i no that is the first step, then, you are supposed to cut the 3x in half and square it. but im confused because it is a prime and odd number!

Answer 8

What are you trying to achieve with that equation? Are you trying to find the zeros?

Answer 9

im trying to find the x and the directions say " solve by completing the square."

Answer 10

ahhh there you go now we can do something with that.

Answer 11

Visit this site. Hope it helps. http://www.purplemath.com/modules/sqrquad.htm

Answer 12

k thanks!