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Verified answer
Mapel : MatematikaKelas : IX SMP
Bab : Akar pangkat
Rumus dasar !
(a - b)² = a² - 2ab + b²
Pembahasan :
(4√7 - √8)²
= (4√7)² - 2(4√7)(√8) + (√8)²
= 112 - 8√56 + 8
= 120 - 8√56
= 120 - 8√[14.4]
= 120 - 16√14