(-9*c - 7)*(c + 9)
(-9*c - 7)*(c + 9) при c = 3/2
(-9*(3/2) - 7)*((3/2) + 9)
(-27/2 - 7)*(3/2 + 9)
-861/4
(9.0 + c)*(-7.0 - 9.0*c)
-(7 + 9*c)*(9 + c)
2 -63 - 88*c - 9*c