Day: December 9, 2013

-20 = -20    (obviously…) =>  16 – 36 = 25 – 45     (just two different ways to write -20) =>  42 – 9*4 = 52 – 9*5     (factoring…) =>  42 – 9*4 + 81/4 = 52 – 9*5 + 81/4     (add 81/4 to both sides) =>   42-2*4*9/2+(9/2)2 = 52-2*5*9/2+(9/2)2 (Only furnishes written) =>  (4 – 9/2)2 = (5 – 9/2)2     (“completing the square”) =>  4 – 9/2 = 5 – 9/2     (get rid of the squares) =>  4 = 5     (cancel the 9/2 from both sides) =>  400 = 500    (multiplication with 100)   You tell…

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Get your friend borrow 500tk from you. Some days go then your friend give you 400tk. You tell why he paid 400tk. Then he tell that 400=500 and he give you a prove. -20 = -20    (obviously…) =>  16 – 36 = 25 – 45     (just two different ways to write -20) =>  42 – 9*4 = 52 – 9*5     (factoring…) =>  42 – 9*4 + 81/4 = 52 – 9*5 + 81/4     (add 81/4 to both sides) =>   42-2*4*9/2+(9/2)2 = 52-2*5*9/2+(9/2)2…

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