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= -6x² + 3x + 8x - 4
= -6x² + 11x - 4
b) (-3p + 1)²
= 9p² - 6p + 1
c)(-5x - 3)³
=(-5x - 3)²(-5x - 3)
= (25x² + 30x + 9)(-5x - 3)
= -125x³ - 150x² - 45x - 75x³ - 90x - 27
= -200x³ - 150x² - 135x - 27
d) -2x(x + 3)(3x - 1)
= (-2x² - 6x)(3x - 1)
= -6x³ + 2x² - 18x² + 6x
= -6x³ - 16x² + 6x