Question

simplify: (5^-2*7^3/5^3*7^-5)-5/2

Answer 1

Hey here is your answer
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$\\ = ( {5}^{ - 2} \times \frac{ {7}^{3} }{ {5}^{3} } \times {7}^{ - 5} ) - \frac{5}{2} \\ \\ = ( {5}^{ - 2} \times { {7}^{3} } \times { {5}^{ - 3} } \times {7}^{ - 5} ) - \frac{5}{2} \\ \\ = ( {5}^{ - 2 + ( - 3)} \times {7}^{3 + (- 5)} ) - \frac{5}{2} \\ \\ = ( {5}^{ - 5} \times {7}^{ - 2} ) - \frac{5}{2} \\ \\ = ( \frac{1}{ {5}^{5} } \times \frac{1}{ {7}^{2} } ) - \frac{5}{2} \\ \\ = ( \frac{1}{3125} \times \frac{1}{49}) - \frac{5}{2} \\ \\ = \frac{1}{153,125} - \frac{5}{2} \\ \\ = 0.0000065306 - 2.5 \\ \\ = − 2.4999934694$
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Hope it may helpful to you

Answer 2

Heya...write ur question properly..
HOPE u understand