# Completely stuck on a question on a maths assignment for hnc engineering watch

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1. Question is

M=wx(l-x)/2

M=70
L=20
W=1.5

I need to rearrange this so I can put it into a quadratic formula. I need to rearrange this equation to the quadratic standard form equation to get values for a, b and c then use the quadratic formula to find 2 possible values for x. Can anyone help please?
2. Multiply out the bracket.
70=1.5x(20-x)/2 =(30x-1.5x^2)/2 = 15x - 0.75x^2
Easy from there.

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Updated: November 13, 2017
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