12x^2-14=0
solve for x

Question

12x^2-14=0
solve for x

anonymous · Answer

online homework is saying that the answer is square root of 42/6

anonymous · Answer

any sugestions guys?

anonymous · Answer

:(

anonymous · Answer

so

anonymous · Answer

??

anonymous · Answer

thats the answer, your book might be wrong unless I made a bloo. But I am pretty confident that is correct

anonymous · Answer

are you sure your question is correct @jammal_a

anonymous · Answer

hang on this is better solution. 
12X^2=14
x^2= 14/12
x=sqrt(14/12)

anonymous · Answer

but that still gives you not the answer your book presents.

anonymous · Answer

i will screenshot it.

anonymous · Answer

@dominator140  @zaisha

anonymous · Answer

I am not to sure what I am looking at in there mate, I dont even see the equation you presented us with.

lgbasallote · Answer

if you're still interested in how it was solved... i can show it to you

$$12x^2 - 14 = 0$$
add 14 to both sides
$$12x^2 = 14$$
divide both sides by 12
$$x^2 = \frac{14}{12}$$
simplify
$$x^2 = \frac 76$$
take the square root
$$x = \sqrt{\frac 76}$$
rationalize
$$x = \frac{\sqrt 7}{\sqrt 6} \times \frac{\sqrt 6}{\sqrt 6}$$
simplify
$$x = \frac{\sqrt {42}}6$$

did you get that?

lgbasallote · Answer

tell me if there's something you don't get in the solution @jammal_a