Jawaban:
c. 8x² + 24x + 10
Penjelasan dengan langkah-langkah:
L = p × l
L = (4x + 2) × (5 + 2x)
L = 4x(5 + 2x) + 2(5 + 2x)
L = 20x + 8x² + 10 + 4x
L = 8x² + (20x + 4x) + 10
L = 8x² + 24x + 10 cm²
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Jawaban:
c. 8x² + 24x + 10
Penjelasan dengan langkah-langkah:
L = p × l
L = (4x + 2) × (5 + 2x)
L = 4x(5 + 2x) + 2(5 + 2x)
L = 20x + 8x² + 10 + 4x
L = 8x² + (20x + 4x) + 10
L = 8x² + 24x + 10 cm²