I cant solve this, and need some quick help. 4*pi*X+2000/x^2=0 Thanks in advance How do I simplify these two? 2X(1000/x2+2x) 2(x+2)(1000/x2+2x)
Last edited by dipsy34; Apr 17th 2008 at 11:53 PM. Reason: Extra problem
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Originally Posted by dipsy34 I cant solve this, and need some quick help. 4*pi*X+2000/x^2=0 Thanks in advance How do I simplify these two? 2X(1000/x2+2x) 2(x+2)(1000/x2+2x) Solve: $\displaystyle 4 \pi x+2000/x^2=0$ multiply through by $\displaystyle x^2$: $\displaystyle 4 \pi x^3+2000=0$ rearrange: $\displaystyle x^3=-~\frac{500}{\pi}$ and you should be able to take it from there. (for the others first multiply out the brackets) RonL
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