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Which long division problem can be used to prove the formula for factoring the difference of two perfect cubes?

a) a² + ab +b²
b) a² - ab +b²
c) a^3 +0a^2b+0ab^2 – b^3
d)a^3 +0a^2b+0ab^2 - b^3

1 Answer

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Final answer:

The correct long division problem to prove the formula for factoring the difference of two perfect cubes is option c) a^3 +0a^2b+0ab^2 - b^3. The formula for factoring the difference of two perfect cubes is (a - b) = (a^2 + ab + b^2), where a represents the cube root of the first term, and b represents the cube root of the second term. By substituting the values according to the formula, you can verify that it is correct.

Step-by-step explanation:

The correct long division problem that can be used to prove the formula for factoring the difference of two perfect cubes is option c) a^3 +0a^2b+0ab^2 - b^3.

To factor the difference of two perfect cubes, you can use the formula (a - b) = (a^2 + ab + b^2). In this case, a represents the cube root of the first term, and b represents the cube root of the second term. By substituting the values according to the formula, you can verify that it is correct.

For example, if a = 3 and b = 2, the equation becomes (3 - 2) = (3^2 + 3(3)(2) + 2^2), which simplifies to 1 = 9 + 18 + 4, and the equation holds true.

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