Question

multiply as indicated without a calculator.
$(-5)(-9)$
12
learn it: multiply and divide integers.
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divide as indicated without a calculator. (if an answer is undefined, enter undefined.)
$(-12) \div (-3)$

Explanation:

Step1: Multiply the two integers

First, recall that multiplying two negative numbers gives a positive result. Calculate the product of the absolute values:
$(-5)(-9) = 5 \times 9$

Step2: Compute the positive product

$5 \times 9 = 45$

Step3: Divide the two integers

Recall that dividing two negative numbers gives a positive result. Calculate the quotient of the absolute values:
$(-12) \div (-3) = 12 \div 3$

Step4: Compute the positive quotient

$12 \div 3 = 4$

Answer:

$(-5)(-9) = 45$
$(-12) \div (-3) = 4$