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= √36.2 - 3√18
= 6√2 - 3√9.2
= 6√2 - 9√2
= - 3√2
jawabnnya - 3√2
kerjain satu2
√72 = √36 x √2 = 6√2
3√3 x √6 = 3√18 = 3 x √9 x √2 = 3 x 3 x √2 = 9√2
baru dikurangi
6√2 - 9√2 = -3√2