Quote:
Originally Posted by blackmonsters
a^2 - 2*a*b + b^2 = (a - b)^2
That would be a brand new kind of math than I never learned.
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(a - b)^2 = (a - b)*(a - b) = a*a - a*b - b*a + b*b = a^2 - a*b - a*b + b^2 = a^2 - 2a*b + b^2
a^2 - 2*a*b + b^2 = (a - b)^2