Question 522923
(x+3)(x-3)
x+3 = 1 addition
x-3 = 1 subtraction
(x+3)*(x-3) = 1 multiplication
So, that is 3 operations
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(x+3)(x-3) = x^2 -3x +3x -9 = x*x -3*x +3*x -9
x*x = 1 multiplication
-3*x = 1 subtraction and 1 multiplication
+3*x = 1 addition and 1 multiplication
-9 = 1 subtraction
So, that is 6 operations
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2n^3 - n^2 is the number of operations.
n = 20
2(20)^3-20^2 = 15,600 operations