Question

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Answer 1

Answer: The answer is -3/5.

Answer 2

`\huge\boxed{\sf -(3)/(5) }`

Explanation:

`\displaystyle (21√(5) )/(-7√(125) ) \\\\125 \ can \ be \ written \ as \ 5 * 5 * 5\\\\= (21√(5) )/(-7√( 5 * 5 * 5) ) \\\\= -(3√(5) )/(√(5^2) * √(5) ) \\\\= -(3√(5) )/(5√(5) ) \\\\= -(3)/(5) \\\\\rule[225]{225}{2}`

Hope this helped!

~AH1807