Jawaban:
(a - b)² = (a-b) x (a-b) = a² - ab - ab + b² = a² - 2ab + b² Maka : (2 x -3)² = (2x - 3)(2x - 3) = 4x² - 6x - 6x + 9 = 4x² - 12x + 9 Jadi, (2 x -3)² = 4x² - 12x + 9
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Jawaban:
(a - b)² = (a-b) x (a-b) = a² - ab - ab + b² = a² - 2ab + b² Maka : (2 x -3)² = (2x - 3)(2x - 3) = 4x² - 6x - 6x + 9 = 4x² - 12x + 9 Jadi, (2 x -3)² = 4x² - 12x + 9