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7225 dm² = s²
√7225 = 85 dm (d)
16. √(225) × 9 = 15 ×3 = 45 (b)
17. 43² : √n = 72
√n = 43² : 72
√n = 1849 : 72
√n = 25,6
n =√25,6 ( mungkin )
kalau di bulatkan menjadi √26
nomor 14 soalnya nggak jelas