To solve the problem, we'll follow the steps outlined:
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Divide \(-72\) by \(-4\): \[ -72 \div -4 = 18 \] (The negative signs cancel each other out.)
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Now, divide the quotient (which is \(18\)) by \(-9\): \[ 18 \div -9 = -2 \]
Therefore, the final quotient is \(-2\).