( 3a + 5b ) ^3
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Step-by-step explanation:
by property ,
(x + y)³ = x³ + y³ + 3x²y + 3xy²
(3a + 5b)³ = (3a)³ + (5b)³ + 3 × (3a)² × 5b + 3 × 3a × (5b²)
= 27a³ + 125b³ + 3 × 9a² × 5b + 3 × 3a × 25b²
= 27a³ + 125b³ + 135a²b + 225ab²
JAI SHREE RAAM
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