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2(3x - 4)(3x - 4)
2(3x(3x) + 3x(-4) - 4(3x) - 4(-4))
2(9x² - 12x - 12x + 16)
2(9x² - 24x + 16)
2(9x²) + 2(-24x) + 2(16)
18x² - 48x + 32