The solution to the problem 2x2 is 4 (the result of multiplication).
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It means that you increase something's height by x2 and its width by x2 (and depth by x2 when you have a 3D object)
Each element is the mean of the corresponding elements. Thus, the mean of (x1, y1) and ( x2, y2) is [( x1 + x2)/2, (y1 + y2)/2]
If you mean: x2+3x+2 then it is (x+1)(x+2) when factored
Assuming you mean: (9x × x2)2 Then we can say: = (9x3)2 = 81x6
The geometric mean of 'A' and 'B' is the square root of ( A x B ). Edit: The geometric mean of n positive numbers, x1, x2, ... , xn is the nth root of x1*x2* ... *xn.