jika(√2-2)(4+√2)=a+b√2, nilai a-b =
Matematika
nasyadil
Pertanyaan
jika(√2-2)(4+√2)=a+b√2, nilai a-b =
1 Jawaban
-
1. Jawaban Anonyme
Kelas 9 Matematika
Bab Akar dan Pangkat
(√2 - 2) (4 + √2) = a + b √2
4√2 + √2² - 8 - 2√2 = a + b√2
4√2 + 2 - 8 - 2√2 = a + b√2
-6 + 2√2 = a + b√2
a = -6
b = 2
a - b
= -6 - 2
= -8