SINCE (−1)3− 2(−1)2− (−1) + 2 = 0, −1 ∈ B

26. - SOLUTION MANUAL FOR DISCRETE MATHEMATICS 7TH EDITION BY JOHNSONBAUGH
SOLUTION MANUAL FOR DISCRETE MATHEMATICS 7TH EDITION BY JOHNSONBAUGH

26. Since (−1)

3

− 2(−1)

2

− (−1) + 2 = 0, −1 ∈ B. Since −1 ∈ / A, A = B .