SOLUTION: I really need help. I am doing something terribly wrong and I do not know how to do this. x^2+4x-12=0 Thank you very much!

Question 701202: I really need help. I am doing something terribly wrong and I do not know how to do this.
x^2+4x-12=0
Thank you very much!

Answer by Simnepi(216) (Show Source): You can put this solution on YOUR website!
to solve quadratic equations the first thing is to look for factor pairs of the constant term, in this case that is -12.
factors of -12 are: (remember one of these has to be a negative number because negative multiplied by positive gives a negative answer)
plus/minus 1 and 12:
plus/minus 2 and 6:
plus/minus 3 and 4.
Now we look to see if any of those factor pairs can be added to make the coefficient of the x term (that's the number in front of the x) which is +4.
Obviously the factor pair we need are plus/minus 2 and 6 because -2 + 6 = +4
Now we get two brackets and put an x in both and one of the factors in the other
Like this
(x+6)(x-2)
making this equal zero means that either one of these brackets could equal zero, that is
either (x+6)=0 OR (x-2)=0
If x+6=0 then x=-6
Or If x-2=0 then x=2
We do not know which of these solutions is the correct one so we give them both.
That is
x=-6 or x=2
RELATED QUESTIONS
Given functions f(x)=3x-4, g(x)=2x^2-7, h(x)=square root of x+5 Find (f o g)(x)= Find (answered by scott8148)

how do i do 2 fifths of 40 i do not know how to do that and it is on my homework which... (answered by checkley71)

Hi, I can't seem to get the answer for this equation: -x-(13+4x)=-3(5-9x)+2 I have... (answered by KnightOwlTutor)

Hi, I can't seem to get the answer for this equation: -x-(13+4x)=-3(5-9x)+2 I have... (answered by tutor_paul)

Tutor, I was hoping you could help me with this problem. I can not seem to get it to (answered by rapaljer,bucky)

So I have another hw question.... synthetic division... 3x^5+4x^2-12x-17 over x-2 I... (answered by ankor@dixie-net.com)

I hope someone can help me I am to for v and round to the nearest tenth. I am lost I do... (answered by MathLover1,rfer)

{{{In ^4sqrt(ab^2)}}} I do not know how to express this in terms of sums and differences (answered by Fombitz,nabla)

i really need help with this problem: express the volume of a rectangular prism with... (answered by stanbon)