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Rational

Mathematics · Class 10

2x-1x²+3 is rational. sqrt(x+1) is not. Domain: exclude zeros of the bottom. Reducing comes after factoring, next pages.

ratio of polynomials
PQ with Q != 0
whole-number powers
keep the ideas separate
Rational: 2x-1x²+3 is rational. sqrt(x+1) is not. Domain: exclude zeros of the bottom. Reducing comes af
WHAT — RATIONAL: 2x-1x²+3 is rational. sqrt(x+1) is not. Domain: exclude zeros of the bottom. Reducing comes af
HOW — Use the idea: Identify what is given, select this topic's rule or evidence, apply it one step at a time, and check
CORE UNDERSTANDING: 2x-1x²+3 is rational. sqrt(x+1) is not. Domain: exclude zeros of the bottom. Reducing comes af

Right triangle — Rational — original sketch for this lesson (not copied from a textbook).