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= 4 - √12 + 2√12 -6
= √12 - 2
= 2√3 - 2
Penyelesaian :
⇒ 2√2 (√2 + √6) -√6 (√2 + √6)
⇒ 4 + 2√3 -2√3 - 6
⇒ 4 - 6
⇒ -2
semoga bermanfaat... :)