Substitution into Expressions (Ex. 3)

What's in this exercise

Answers are hidden — sign up to practise and check your work.

1. Question 1

   Multiple choice

   Which expression gives the greater value when x = −2: 3x + 10 or x²?

2. Question 2

   Multiple choice

   Evaluate 4 − 3(x + 2) when x = −1.

3. Question 3

   Multiple choice

   Find the value of (a − b)² when a = 1 and b = −3.

4. Question 4

   Sequence

   Evaluate −2x² + 5x − 1 when x = −1. x² = 1. −2 × 1 = −2. 5 × (−1) = −5. −2 + (−5) − 1 = ___.

5. Question 5

   True or false

   The expression (−x)² always gives the same result as x².

More exercises in this module

• Algebraic Expressions & Formulas (Ex. 3)

• Linear Sequences & nth Term (Ex. 2)

• Substitution into Expressions (Ex. 1)

• Algebraic Expressions & Formulas (Ex. 2)

• Forming & Solving Equations (Ex. 1)

• Substitution into Expressions (Ex. 2)