if the polynomials ax³ + 3x² -3 and 2x³ -5x + a are divided by (x-4) leaves the same remainder, find the value of a
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x - 4 = 0
x = 4
ax³ + 3x² - 3 = 2x³ - 5x + a
a(4)³ + 3(4)² - 3 = 2(4)³ - 5(4) + a
64a + 48 - 3 = 128 - 20 + a
63a = 63
a = 1
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