Chứng minh:
a. A∩(B\C) = (A∩B)\C
b. A\(B∩C) = (A\B)∪(A\C)

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

Complete the conditional statement. if a + 2 < b + 3, then a < b b < a a – b < 1 a < b + 1