p(x) = 2x² - 4x and q(x) = x - 3
so (p · q)(x) = p(x) · q(x)
(2x² - 4x)(x - 3)
= 2x²(x - 3) + -4x(x - 3)
= 2x³ - 6x² + -4x² + 12x
= 2x³ - 10x² + 12x
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