This study notes covers Worked Example 5: With Powers within Simplifying Expressions for GCSE Mathematics. Revise Simplifying Expressions in Algebra for GCSE Mathematics with 11 exam-style questions and 5 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 12 of 18 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 12 of 18
Practice
11 questions
Recall
5 flashcards
Worked Example 5: With Powers
Find the value of x² + 2x − 5 when x = 3
Step 1 Substitute x = 3
= (3)² + 2(3) − 5
Step 2 Work out powers first (BIDMAS)
= 9 + 2(3) − 5
3² = 9
Step 3 Then multiplication
= 9 + 6 − 5
= 10