Mohon penjelasan penyelesaian soal (2x+y)^3 Terima kasih

(2x+y)^3
=(2x+y)*(2x+y)*(2x+y)
=(2x+y)(4x2+4xy+y2)
=(2x)(4x2) + (2x)(4xy) + (2x)(y2) + (y)(4x2) + (y)(4xy) + (y)(y2)
=8x3 + 8x2y + 2xy2 + 4x2y + 4xy2+y3
=8x3 + 12x2y + 6xy2 + y3

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