If a²-b²=21 and… | ClassNotes

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If a²-b²=21 and… | ClassNotes

E

Editor

Sep 18, 2022

If a²-b²=21 and a²+b²=29, which of the following could be the value of ab?

Difficulty: Easy

A:

10

B:

23

C:

45

D:

21

ID: 63273db5ca83163ac3a0ad47