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if x = ucos(pi/4) -

  1. if x = ucos(pi/4) - vsin(pi/4) and y = usin(pi/4) + vcos(pi/4), find A, B and C so that,5x^2 - 6xy + 5y^2 = Au^2 + Buv + Cv^2.
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    2. Nicole asked by Nicole
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