Factor the difference of two squares.
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Question

Quizplus · Accepted Answer

The difference of two squares formula is (a^2 - b^2) = (a + b)(a - b). In this case, we don't know the values of a and b, but we can see that the last two digits of the two options that have different second-to-last digits (B and C) end in 16 which is the product of the last digits (4 and 4). This suggests that the factors are (a + 4) and (a - 4), since only the sum or difference of the last digits will be a multiple of 8. The first digits of the factors must be 11ebb63d_1b75_8981_b851 and 11ebb63d_1b75_8980_b851 in some order. The only option that matches is B, since it has the correct second-to-last digit and the factors match with our reasoning.

Factor the Difference of Two Squares