1. Using the binomlal theorem expression, what is the expansion of (z+ 3y)°? O (z +3y) = + *y+a*y? + a*y³ + xy! + y° %3D O (a + 3y) = 25+ 5a y+ 102 y + 102?y +5+yo %3D O (a +3y) y+15yf+90y a2+ 270yP3+405ya + 243 %3D O (2 + 3y) = 25 + 15*y + 90a°y + 270a²y +405zy + 243y

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