Which long division problem can be used to prove the formula for factoring the difference of two perfect cubes? + ab +
a+b)a- ab
+b)a? +Da+b+dad- b
a-b)2? + Da*b+ Dað? - B

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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step-by-step explanation:

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