### Home > CCA2 > Chapter 12 > Lesson 12.1.2 > Problem 12-34

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### Missing problem for Book CCA2 => Chapter Ch12 => Lesson 12.1.2 => Problem 12-34

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To check a division problem using multiplication, multiply the divisor by the quotient. In the second case, multiply (*x* − 1)(*x* + 1). Does it equal *x*^{2} − 1? How will you check the third and fourth cases?

Look for a pattern in the quotients. Look at the number of terms and the exponent each term.