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Help! I am trying to explain how to solve this to my daughter and I do not remember how. p+2/p=-3?
I need to solve this as my daughter is having problems...how do i explain this to her?
8 Answers
- MattLv 41 decade agoFavorite Answer
is it:
(p+2)/p=-3
or as you have it written?
if it is like above, then multiply both sides by p: p+2=-3p
subtract a p from both sides: 2=-4p
divide both sides by -4 and you get p=-1/2
if you really meant what you wrote, then you would multiply everything by p: p^2+2=-3p
add 3p to both sides: p^2+3p+2=0
factor: (p+2)(p+1)=0
then either p+2=0 or p+1=0, or p=-2 or p=-1
- 1 decade ago
Maybe not the most direct route but...
P + 2/p = -3
p^2+2 = -3p multiply everything by p (clears the fraction) (p^2 = p squared)
p^2 + 3p + 2 = 0 make it a quadratic equation
(p+2)(p+1)=0 factor the quadratic
P= -2 or -1 solve for p
- 1 decade ago
Do you mean (p+2)/p = -3 or p+(2/p) = -3?
For the first one, multiply both sides by p to get
(p+2) = -3p
Then subtract p from both sides to get
2 = -4p
divide both sides by -4 to get
p=2/-4 =-1/2
For the second one, subtract p from both sides to get
(2/p) = -3 - p
multiply both sides by p to get
2 = -3p -p^2
add -3p and -p^2 to both sides to get
p^2 +3p +2 = 0
Then factor the quadratic to get
(p+2)(p+1) = 0
Then solve p for 0
p+2 = 0 and p+1 = 0
p then equals either -2 or -1
Source(s): Sophomore in calculus - 1 decade ago
if you look at the equation you have P+2/p = 3 the answer is P=1 the solution is as follows
if you subtract 2 from each side of the equation you are left with p/p=1 or looking the second method - if you divide p/p then add 2 to that answer and you have to make it equal 3. p could be any number, but when you divide it into each other it has to equal 1.
Source(s): look at algebra 101 - How do you think about the answers? You can sign in to vote the answer.
- 1 decade ago
answer is p=-1, -2 how?
here it is:
you first find the LCM of the denominators 1 and p which is p
(p^2+2)/p= -3
then cross multiply:
p^2+2=-3p
p^2+3p+2=0
now factorise
p^2+2p+p+2=0
p(p+2)+1(p+2)=0
(p+2)(p+1)=0
therefore, p= -2 and p= -1, that's it...
- nickyb1290Lv 41 decade ago
First of all, it is more prudent to work with less fractions, so we multiply p on both sides.
p+2=-3p Now, we subtract p on both sides
-p -p
2=-4p
/-4 /-4
-1/2=p
- Anonymous1 decade ago
Is p+2/p= (p+2)/p or p+(2/p) ??
if (p+2)/p = -3 ---> p+2 = -3p ---> p = ...
if p+(2/p) = - 3 ---> p^2 + 3p + 2 = 0 ----> p = ...