The height s metres of a mass thrown vertically upward at a time t seconds given by S=40t-13t2 Show when 25m= 40t - 13t2, 13t2 - 40t + 25 = 0 There is something about what you do to one side you have to do to the other?
Last edited by HollieMay2600; Mar 20th 2012 at 04:27 AM.
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What is m?
Originally Posted by Prove It What is m? m is metres
Originally Posted by HollieMay2600 Show when 25m= 40t - 13t2, - 13t2 - 40t + 25 = 0 There is something about what you do to one side you have to do to the other? I suppose that this represents system of two equations : (1) : (2) : (1)+(2) : hence :
Originally Posted by princeps I suppose that this represents system of two equations : (1) : (2) : No. This should be which has, by the quadratic formula, solutions . (1)+(2) : hence :
Yes it is clear now , after original post is edited .
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