How are singularity functions used in beam analysis?

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hatchelhoff
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HI
I am going through an example on signularity functions.
I don't understand how the author went from the line which I highlighted in blue to the line which I highlighted in red.
Two facing textbook pages on singularity functions: Example 3-2 with beam loading and deflection equations, and a boxed step simplifying a boundary condition, with a blue box on one line and a red box on the next.
 
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Sure. Could you focus a little bit ? Or retype the pertaining section ? :rolleyes:
 
Hope this helps
Printed equations from a textbook: R2(l - a) - (w/2)(l - a)^2 + C1 l + C2 = 0, with the line 'Simplifying and noting that l - a = b gives', followed by C1 a + C2 = -wb^2/2.
 
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  • Printed equations from a beam deflection text: R2(l - a) - (w/2)(l - a)^2 + C1 l + C2 = 0, then simplifying with l - a = b gives C1 a + C2 = -wb^2/2.
    upload_2017-5-6_13-23-56.png
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