Toán Lớp 9: Tính:
a) √49 x √144 + √256 : √64
b) 72 : √2^2.36.3^2 – √225
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Toán Lớp 9: Tính:
a) √49 x √144 + √256 : √64
b) 72 : √2^2.36.3^2 – √225
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