Di jawab secepatnya ya

[tex] \sqrt{18} - \sqrt{12} / \sqrt{18} + \sqrt{12} [/tex] disederhanakan dahulu (masing masing dikali [tex] \sqrt{18} - \sqrt{12} [/tex]) hasilnya sama dgn 5-2√6.

Lalu sederhanakan 5/1+√6 (masing masing dikali 5/1-√6) hasilnya sama dgn -1+√6

5-2√6+(-1+√6) = 4-√6 (D)

(√18 - √12)/(√18 + √12) + 5/(1 + √6)
= (3√2 - 2√3)/(3√2 + 2√3) + 5/(1 + √6) . (1 - √6)/(1 - √6)
= (3√2 - 2√3)/(3√2 + 2√3) . (3√2 - 2√3)/(3√2 - 2√3) + 5(1 - √6)/(1 - 6)
= (18 - 6√6 - 6√6 + 12)/(18 - 12) + 5(1 - √6)/(-5)
= (30 - 12√6)/6 + -1(1 - √6)
= 5 - 2√6 - 1 + √6
= 4 - √6