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p: (9√2 - 5√3)
l: (3√2 + √3)
dit = luas persegi panjang ..... ?
jawab =
p × l
(9√2 - 5√3) × (3√2 +√3)
(9√2 × 3√2) - (-5√3 × √3)
(27 × 2) - (-5 ×3)
54 - (-15)
54 + 15
69