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a : b = 5 : 3
a - b = 48
5x - 3x = 48 ...>misal x sebagai variabel perbandingan
2x = 48
x = 48/2 = 24
a... 5 x 24 = 120
b...3 x 24 = 72
a² + b² = 120² + 72²
= 14.400 + 5.184
= 19.584