Solve for the variable exactly :

1. P^2=2(p+8)
2. 1/n + 2/n-1 =3

Question

Solve for the variable exactly :

1. P^2=2(p+8)
2. 1/n + 2/n-1 =3

triciaal · Answer

1.
distribute to get rid of ( )
rearrange to set = 0
factor
solve for x
let me know if you need more help / show your values of x

2. is it 2/n or 2/(n-1)?
leave the variables on one side
 when working with fractions multiply everything by the LCD to get rid of the fraction
solve for n

anonymous · Answer

@triciaal for the first problem would I have to do the quadractic formula since there is nothing that multiples to -16 but adds to -2

anonymous · Answer

& for the second one it was 2/(n-1). I apologize for forgetting the parenthesis. Would the steps still be the same for that one ?

triciaal · Answer

i got 2+/- rt 132

triciaal · Answer

yes

anonymous · Answer

Was that your answer for the first problem? because I got $$ \frac{2 \pm \sqrt{68} }{ 2 }$$

triciaal · Answer

I have 3n^2-6n -1 =0

triciaal · Answer

#1 a = 1 yeah my mistake the denominator is 2 but how did you get 68

triciaal · Answer

4rt8

triciaal · Answer

1 +/- 2rt8

anonymous · Answer

$$\frac{ 2 \pm \sqrt{-2^{2}-4(1)(-16)} }{ 2 }$$

triciaal · Answer

sorry my mistake when I did 4ac I use -2

anonymous · Answer

So would I be correct in my calculation from before ?

triciaal · Answer

now simplify what you have

anonymous · Answer

when i simplified I got $$1 \pm \sqrt{17}$$

triciaal · Answer

no

triciaal · Answer

wait

anonymous · Answer

68 simplifies to 17 * 4.

4 is a perfect sqr, so you take out 2 leaving 17 in the Sqrt, the you can cancel out all the 2's leaving you with one in the numerator

triciaal · Answer

yes

triciaal · Answer

that's what i was doing. good job

anonymous · Answer

thank you for your help

triciaal · Answer

your welcome