it would be 1 fourth multiplied by quanity d squared plus 3d plus 9
(1/4)(d2 + 3d + 4)
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3d + 14 = 11 is the equation.
They are: 6d+6 or 6(d+1)
c2 - 6cd + 9d2 - 4 The first three terms are a complete square = (c - 3d)2 - 4 Difference of two squares = (c - 3d + 2)(c - 3d - 2)
2d
because this is the importance for them to not to be watching the 3d model from the computer