What are the solutions of the quadratic equation below?
4x^2 - 30x + 45 = 0

Question

What are the solutions of the quadratic equation below?
4x^2  -  30x  +  45  =  0

skullpatrol · Answer

Hi

anonymous · Answer

wanna explain this one ?

skullpatrol · Answer

Sure :D

skullpatrol · Answer

Any ideas where you would start?

skullpatrol · Answer

$$4x^2  -  30x  +  45  =  0$$Solve for x.

anonymous · Answer

Use the quadratic formula.....$$x=-b \pm \sqrt{b ^{2}- 4ac}/ 2a$$

skullpatrol · Answer

@xcaseynoel  Have you covered the quadratic formula in class?

anonymous · Answer

i take online classes, so i have to learn it myself.

skullpatrol · Answer

Have you learned it yourself?

anonymous · Answer

nope, hence why i put it up here...

skullpatrol · Answer

The general form of a quadratic trinomial is $$ax^2+bx +c$$

skullpatrol · Answer

Can you identify the a, b, and c in your question: $$4x^2  -  30x  +  45  $$

anonymous · Answer

4, -30, 45

skullpatrol · Answer

Correct :D

anonymous · Answer

so then what do i do?

anonymous · Answer

@xcaseynoel quadratic formula is really easy just go through any video about it......best reference will be khanacademy. U will understand easily.......answer to this question: $$x=\frac{ 30+6\sqrt{5} }{8 }$$ Or $$x=\frac{ 30-6\sqrt{5} }{8 }$$

skullpatrol · Answer

http://www.youtube.com/watch?v=iulx0z1lz8M

anonymous · Answer

@xcaseynoel hope you got it......