Mathematics for IGCSE & O level - Surds (Section 2 - No. 21)
Which of these are in the form a + b√c?
√5 + √2
3+2√3
5 + 0√7
2√7
Giải thích
Options B and C conform to the specified format. Option A contains more than one surd, and option D is equal to 0 + 2√7, hence also correct.