The fourth term of the polynomial (d - 4b)³ is D. -64d³
A polynomial is an expression involving the operations of addition, subtraction, multiplication of variables.
Given the expression (d - 4b)³, we need to open the bracket, hence:
(d - 4b)³ = d³ + 3(d²)(-4b) + 3(d)(-4b)² + (-4b)³
= d³ - 12bd² + 48b²d - 64d³
Therefore the fourth term of (d - 4b)³ is D. -64d³
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