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Solve: (sqrt((25)/9)-sqrt((64)/(81)))-:s...

Solve: `(sqrt((25)/9)-sqrt((64)/(81)))-:sqrt((16)/(324))=?` (a) 4.5 (b) 2.5 (c) 1.5 (d) 3.5

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  12. sqrt(24-:0. 5+1)+sqrt(18-:0. 6+6)=? (a) 19 (b) 13 (c) 12 (d) 15

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  14. 9x^2+25-30 x can be expressed as the square of 3x^2-25 (b) 3x-5 (c)...

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