Quote:
Originally Posted by Chris
2(a² - ab) = a² - ab
You should get 0 from this line.
You stated a = b so if we subsitute we get 2(a² - aa) = a² - aa
Apply the basic rule of calculus that brackets, division, multiplication, ddition & subtraction must be done in that order and we get:
2(0) = 0
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Thank god I am not senile yet!!!