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# Quadratic Formulae watch

1. I have no clue how to do this question! Any help would be appreciated.

Solve the following equations, giving your answer in the exact form (i.e. involving square roots)

3x^2 + 8x + 2=0

Here is my answer, I know this is wrong but I am not sure where I am going wrong.

If someone could give me directions as to where I am going wrong here it would be great.
2. you use an equation for the quadratic formulae

where a=3 b=8 and c=2

put your values in and simplify the b^2 - 4ac bit
3. I don't see what's wrong.
4. What i find helps alot is to not just plug everything into the caluclutor. Do the (b^2-4ac) first and the 2a then input it into your calculator.
5. Perhaps try and complete the square.
3(x^2+(8/3)x+(2/3))
3(x^2+(8/3)x+(16/9)-(16/9)+(2/3))
3((x+(4/3))^2)-(10/9)
3(x+(4/3))=(10/9)^(1/2)
6. t
(Original post by Keoje)
I don't see what's wrong.

The answer in the book is:

Don't see how to get to that answer
7. (Original post by Shakaa)
The answer in the book is:

Don't see how to get to that answer
It is the same. Just that is simplified version.

square root = sqr

sqr(40) = sqr(4)sqr(10)
= 2 sqr(10)

Do you know what to do now?
8. Ah, I see now. Thanks!

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