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= 11√5
b. 2√108 - √147
= 2√36.3 - √49.3
= 2.6√3 - 7√3
= 12√3 - 7√3
= 5√3
c. √294 + 3√150 - 2√96
= √49.6 + 3√25.6 - 2√16.6
= 7√6 + 3.5√6 - 2.4√6
= 7√6 + 15√6 - 8√6
= 114√6
d. 3√112 - 5√252 + 8√175
= 3√16.7 - 5√36.7 + 8√25.7
= 3.4√7 - 5.6√7 + 8.5√7
= 12√7 - 30√7 + 40√7
= 22√7