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b.
c.
d.
b) -3 +3xy +5xy -5 = -3 - 5 + 8xy
c) (-3x-3)(x-2) = -3+6x-3x+6 = -3 + 3x + 6 = -3(-x-2)
d) (3x+6)(x-3)-10x+8-3 -10 = 3 - 9x + 6x - 18 - 10x + 8 - 3 -10 = -19x - 14