Ответы на вопрос:
A) ( x - 1)(x+ 2)(x+ 10) = 0 произведение равно 0,когда один из множителей равен0,значит, x - 1 = 0 x = 1 x + 2 = 0 x = - 2 x + 10 = 0 x = - 10 б) - x² = - 36 x² = 36 x = 6 x = - 6 в) 5x = - 20x 5x + 20x = 0 25x = 0 x = 0 г) - 4x² + 8x = 0 4x² - 8x = 0 4x(x - 2) = 0 4x = 0 x = 0 x - 2 = 0 x = 2 д) x² = 8 x = √8 = 2√2 x = - √8 = - 2√2 е) (x - 2)(x + 3) = - 6 x² + x - 6 + 6 = 0 x² + x = 0 x( x + 1) = 0 x = 0 x + 1 = 0 x = - 1
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