8
16
32
48
Correct answer is C
√128+√18−√k=7√2√2×64+√9×2−√k=7√28√2+3√2−√k=7√2;11√2−√k=7√2−√k=7√2−11√2;−√k=−4√2;√k=4√2=√42×2=√16×2;√k=√32;k=32
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