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Verified answer
Verified answer
Mapel : MatematikaKelas : IX SMP
Materi : Merasionalkan bentik akar
Pembahasan :
(3 - √7)/(3 + √7)
= (3 - √7)/(3 + √7) . (3 - √7)/(3 - √7)
= (3 - √7)²/[(3 + √7)(3 - √7)
= (9 - 6√7 + 7)/(9 - 7)
= (16 - 6√7)/(2)
= 8 - 3√7