Identify the following as rational or irrational numbers. Give the decimal representation of rational numbers.
$negative square root of 0.64 end root$

negative square root of 06.4 end root space equals space minus space square root of 0.8 cross times 0.8 end root equals space minus 0.8 space equals space minus 8 over 10 equals negative 4 over 5

which is a rational number

Here p -4
q = 5

left parenthesis not equal to 0 right parenthesis

Its decimal representation is - 0.8

5 space right parenthesis space 4. space 0 space left parenthesis space 0. space 8 space space space space bottom enclose 4.0 end enclose space space space space space straight x

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