alleryExpanding (2x + 3y)^5 using Pascal's row 1 5 10 10 5 1, the coefficient of x²y³ is
A1080
B720
C180
D360
Answer & Solution
Correct answer: A. 1080
T_(r+1) with r = 3 gives ⁵C_3 · (2x)² · (3y)³ = 10 · 4x² · 27y³ = 1080 x² y³.
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