Equations Involving Surds
Pure and mixed surds · Five steps · Rejecting false roots
Say what a surd is and give examples
Tell a pure surd from a mixed surd
Solve a surd equation in five steps
Check answers and reject false roots
√2 = 1.4142135... never ends, never repeats
√3, √7, ∛2, ∛5 are all surds
√16 = 4 and ∛27 = 3 are NOT surds
Hippasus, about 500 BC: founder of the idea
Robert Recorde, 1551: first formal use of the word
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