Stage 9 · Rational Expressions & Equations

9.4.5 Simplify, Then Evaluate

9.4 Adding and Subtracting Rational Expressions, and Mixed Operations

Point 5 of 5

9.4.5 Simplify, Then Evaluate

Core idea

Simplify a messy expression all the way down before substituting numbers, so you don't plug in early and grind yourself into the ground.

Module goal. Finish the last of the four operations — addition and subtraction — and pull everything together into the skill of full simplification.

eastmath.com · 9.4 Adding and Subtracting Rational Expressions, and Mixed Operations · 9.4.5 Simplify, Then Evaluate