the coefficient of X in the expansion of X + 3 ka whole cube is
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Answer:
(x + 3)³ = x³ + 9x² + 36x + 9
Step-by-step explanation:
==: (a + b)³ = a³ + 3a²b + 3ab² +b³
==: (x + 3)³ = x³ + 3x²*3 + 4x*3² + 3³
==: (x + 3)³ = x³ + 9x² + 36x + 9
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