pi2x^2
[pi(2x)squared]
Is this possible to solve for x?
Please give me a step by step if it is, or explain why it's not possible.
Note: I am solving for the area of a circle. I am using the formula, pi(r)^2. (2x is the radius of the circle.)
2007-05-28 08:56:44 · 6 answers · asked by mlygsby 3 in Science & Mathematics ➔ Mathematics
If you wanted to solve the equation
A = pi(2x)^2
It is possible to solve for x; you will have two solutions though.
A = pi(4x^2)
A = 4pi(x^2)
A/(4pi) = x^2
Taking the square root of both sides,
x = +/- sqrt( A/(4pi) )
If x has any restrictions (such as limiting what x can be, i.e. x cannot be negative) then x may not have two solutions.
2007-05-28 09:05:41 · answer #1 · answered by Puggy 7 · 1⤊ 0⤋
It is already solved.
If the radius of the circle is 2x then the area=pi(2x)^2 = 4pix^2 ... the end.
2007-05-28 09:14:23 · answer #2 · answered by vahucel 6 · 0⤊ 0⤋
You can but you will have to have that equation equal something. If you are solving for x then you will need to know the area of the circle then solve for x. Without an area then you are not able to solve for x.
2007-05-28 09:00:34 · answer #3 · answered by Cool Nerd At Your Service 4 · 0⤊ 0⤋
relies upon what you call a "answer". prepare a Cartesian plot (x-axis and y axis). draw a line that is going in the time of the factors (0, 12) and (12, 0) for somebody examining geometry, that line itself is a answer. In algebra, any component on the line (to illustrate (3, 9) or (-7, 19)) is a answer -- there woud be a limiteless sort of suggestions. --- even although, in case you may desire to become attentive to a particular component as a answer (i.e., a special answer), then you definately want extra advice. you like something which will %. some component on the line and make it the answer. it might desire to be person-friendly or difficult (counting on the form of situation), even even though it has to usher in yet another piece of advice. to illustrate: Q.: what component is closest to the inspiration, in x+y=12 ? A.: (6, 6)
2016-10-09 00:21:42 · answer #4 · answered by Anonymous · 0⤊ 0⤋
To solve you will need to know the area of the circle... this is how you would do it:
A= pi(r)^2
with r = 2x
A = pi(2x)^2
A = 4pi(x^2)
(A/4pi) = x^2 // Take square root of both sides
sqrt(A/4pi) = x
Answer :
x = (+ -)sqrt (A/4pi)
2007-05-28 09:07:13 · answer #5 · answered by pya102 2 · 0⤊ 0⤋
need more info. need
[pi(2x)squared] = ?
then it is a simple algebraic manipulation
2007-05-28 09:03:56 · answer #6 · answered by Piglet O 6 · 0⤊ 0⤋