Mathematics for IGCSE & O level - Surds (Section 2 - No. 3) | ExamPlay

Mathematics for IGCSE & O level - Surds (Section 2 - No. 3)

Which of the following is equivalent to √72 - √8?

4√2

2√2

8√2

6√2

Explanation

√72 - √8 = 6√2 - 2√2 = 4√2

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