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1. |
If \(\sqrt {86 - 60\sqrt 2 } \; = \;a - b\sqrt 2 ,\) then what will be the value of √(a2 + b2), correct to one decimal place? |
A. | 7.2 |
B. | 8.2 |
C. | 8.4 |
D. | 7.8 |
Answer» E. | |