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= 7√2 + 3√2 - ( 2√2 / 4√2 )
= 10√2 - 1/2
semoga membantu ^_^
= √(49.2) + √(9.2) - √(4.2) / √(16.2)
= 7√2 + 3√2 - 2√2 / 4√2
= (7+3-2)√2 / 2√2
= 8√2 / 2√2
= 4