Mathematics for IGCSE & O level - Surds (Section 2 - No. 5) | ExamPlay

Mathematics for IGCSE & O level - Surds (Section 2 - No. 5)

What is the value of a^2 - b^2 if a= √5 and b= √2?

3

7

√7

√3

Explanation

a^2-b^2=(√5)^2-(√2)^2=5-2=3

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