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Verified answer
Mapel : MatematikaKelas : VIII SMP
Materi : Persamaan Kuadrat
Rumus dasar :
(a - b)² = a² - 2ab + b²
Pembahasan :
(a - 3b)²
= a² - 2(a)(3b) + (3b)²
= a² - 6ab + 9b²
Verified answer
(a - 3b)^2 = a^2 - 6ab + 9b^2