Ответы на вопрос:
1) х -3х(1 - 12х) = 11 - (5 - 6х)(6х + 5) x - 3x + 36x² = 11- (25 - 36x²) - 2x + 36x² = - 14 + 36x² -2x = -14 x = 7 2) (6х - 1)(6х + 1) - 4х(9х + 2)= - 136x² - 1 - 36x² - 8x = - 1 - 8x = 0 x = 0 3) 16х(2 - х) + (4х + 5)^2 = 132x - 16x^2 + 16x^2 + 40x + 25 = 1 72x = - 24 x = - 24/72 x = - 1/3
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