Jika (√2-2)(4+√2)=a+b √2,nilai a-b adalah....
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Pertanyaan
Jika (√2-2)(4+√2)=a+b √2,nilai a-b adalah....
1 Jawaban
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1. Jawaban Anonyme
(√2 - 2)(√2 + 4) = a + b√2
(√2 - 2)(√2 + 4)
= √2 (√2 + 4) - 2(√2 + 4)
= 2 + 4√2 - 2√2 - 8
= -6 + 2√2
a = -6
b = 2
a - b = -8 ✔