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If x^2+6x=9, what is the value of (x+3)^2? The answer is 18. I completed the square but i'm not sure what to do next? Find x on right triangle.? Was Pascal's bet an example of the reasoning power of a great genius? Use the mean value theorem to show that for any real number a,b ICos(a)-Cos(b)I<=Ia-bI? Why is human reproduction so disgusting ?