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Verified answer
√180 - 2√80 + √245= √(36 × 5) - 2√(16 × 5) + √(49 × 5)
= 6√5 - (2 × 4)√5 + 7√5
= (6 - 8 + 7)√5
= 5√5
Mapel : Matematika
Bab. : Pengakaran
Pembahasan:
√180 - 2√80 + √245
→ √36.5 - 2√16.5 + √49.5
→ 6√5 - 8√5 + 7√5
→ -2√5 + 7√5
→ 5√5 → Jwbnya
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