To solve the problem, we need to divide \(-72\) by \(-4\) first, and then take that quotient and divide it by \(-9\).
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First Division: \[ -72 \div -4 = 18 \] (Dividing two negative numbers results in a positive number.)
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Second Division: \[ 18 \div -9 = -2 \] (Dividing a positive number by a negative number results in a negative number.)
So, the final quotient is \(-2\).