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= 2(2x + 4) + 2(4 + x)
= 4x + 8 + 8 + 2x
= 4x + 2x + 8 + 8
= 6x + 16 cm
L = p x l
= (2x + 4) x (4 +x)
= 8x + 2x(pangkat 2) + 16 + 4x
= 2x(pangkat 2) + 4x + 8x + 16
= 2x(pangkt 2) + 12x + 16 cm(pangkat 2)
maaf kalau gak bisa nulis pangkat duanya, maaf kalo salah, semoga membantu