What is the binomial expansion of (x + 2y)??
O 2x7 + 14xy + 42x5y² + 70x¹y³ +70x³y + 42x²y5+ 14xy + 2y7
Ox7+ 14xy + 42x³y² + 70x¹y³ + 70x³y² + 42x²y³ + 14xy + y²
Ox7+ 7xy + 21x³y² + 35x¹y³ + 35x³y² + 21x²y³ + 7xy + y²
Ox7+14x6y + 84x³y² + 280x¹y³ + 560x³y +672x²y³ + 448xy + 128y7