Last updated on Oct 23, 2026

Adding & Subtracting Algebraic Expressions (Leaving Cert Mathematics): Quizzes

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Adding & Subtracting Algebraic Expressions

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What are like terms?

Terms with same variables raised to same powers

Which pair are like terms?

$3x^2$ and $-2x^2$

Are $a$ and $b$ like terms?

No, different variables

What is the first step when adding $(3x + 2) + (5x - 1)$ ?

Remove parentheses

What is the first step when subtracting $(4x + 7) - (2x + 5)$ ?

Remove parentheses & change signs

Simplify: $(3x^2 + 2x + 1) + (5x^2 - x + 4)$

$8x^2 + x + 5$

Simplify: $(4x^2 - 3x + 7) - (2x^2 + x - 5)$

$2x^2 - 4x + 12$

Combine the like terms: $2x + 5x$

$7x$

Simplify: $(2x + 3y - 5) + (4x - y + 2)$

$6x + 2y - 3$

Are $3$ and $6$ like terms?

Yes, both are constants

Explore Leaving Cert Mathematics Revision Notes by Topics

The Basics

Algebraic Fractions

Factorisation

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The Basics

Algebraic Fractions

Factorisation

Explore Leaving Cert Mathematics Flashcards by Topics

The Basics

Algebraic Fractions

Factorisation

Explore Leaving Cert Mathematics Exam Questions by Topics

The Basics

Algebraic Fractions

Factorisation

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