x^2+3x+15=?

HELP?

Question

x^2+3x+15=?

HELP?

raden · Answer

use the quadratic formula,..

anonymous · Answer

whats that?

jennychan12 · Answer

$$\frac{ -b \pm \sqrt{b^2-4ac}}{ 2a }$$

hba · Answer

But it is not equal to 0

anonymous · Answer

ok now what do i do?

hba · Answer

Do you have to factor it or find x ?

jennychan12 · Answer

x^2+3x+15
a = 1 
b = 3
c = 15

plug everything into the quadratic formula. 
oh and i forgot, it's

hba · Answer

Actually the standard form of quad equation is

$$ax^2+bx+c=0$$so we will not use quad formula.

jennychan12 · Answer

@hba 
find x using quad. form.
sorry. it should be 
$$x = \frac{ -b \pm \sqrt{b^2-4ac}}{ 2a }$$

jennychan12 · Answer

(i just forgot an x = )

hba · Answer

There are twp methods to factorize it,

1)Breaking the middle term 

2) Completing the square method

anonymous · Answer

ok thank you so much!

hba · Answer

@RadEn 

What do you have to say ?

hba · Answer

@xxjakkixx 

You don't have to find x i guess,you have to factorize it.

jennychan12 · Answer

you have to use quadratic formula if it's not factorable. in this case, it's not. so u have to either complete the square or use quadratic formula.

raden · Answer

hmmm.. i think, xxjakik forgot to give the "zero" at right side

hba · Answer

@RadEn 

If their is a zero than you guys are correct,which she has not provided.

Else,I am right.