Four Algebra Groaners
Question: Miss sqrt(7) had three older brothers: cube root of 7, 1/7, and sqrt(-7). Why did she refuse to speak with her brothers?
Answer: One brother was irrational, one brother kept repeating himself, and the remaining brother was unreal.
Question: Why can a ghost solve the equation x2 = -4, but not the equation x2 = 4?
Answer: Because everything that a ghost does is imaginary.
Question: What does an unsuccessful dieter have in common with the quadratic binomial x2 + 4?
Answer: Both are irreducible.
Question: How is driving a heavily loaded truck up a steep hill like graphing the function y = f(x) - 1?
Answer: You need to down shift.
Source: June Oliver. Algebra, Trig, and Pre-Calc Laughs. 2000