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Anonymous
It is -15x2 + x - 21.
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x + x + 1 + x + 2 + x + 3 = -144x + 6 = 144x = 8x = 2
x(x4+x3+x2+x+1)
(X) x (4) x (8) x (12) = 384 X
= 18x + 13
no...why would it.... it equals 2x+9