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