Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
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It is simple. Here we are dealing with the polynomial of degree "2" so when we will take a an under root on both sides, we will find two solutions of x one with a positive sign and one with negative sign.
Who says you should only use the principal root in this case. That would only get one root, a quadratic has 2 roots. See post #2
I still don't get it. I learned that √(x) or x^(1/2) is the principal square root of x.
That is only two distinct ways.
So there are four ways of expressing it?
Hi again, this question may seem silly, but I'm confused.