A) 8.484
B) 8.526
C) 8.426
D) 8.876
Correct Answer: A
Solution :
\[\sqrt{8}+2\sqrt{32}-3\sqrt{128}+4\sqrt{50}\] \[=2\sqrt{2}+8\sqrt{2}-3\times 8\sqrt{2}+4\times 5\sqrt{2}\] \[=2\sqrt{2}+8\sqrt{2}-24\sqrt{2}+20\sqrt{2}\] \[=(2+8-24+20)\sqrt{2}\] \[=6\sqrt{2}=6\times 1.414=8.484\]You need to login to perform this action.
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