1) 5x - x^2 = 0
x(5 - x) = 0
x1 = 0
5-x = 0
-x = -5
x2 = 5
ответ: 0 и 5.
2) 2x^2 - 3x - 9 = 0
D = (-3)^2 - 4*2*(-9) = 9 + 72 = 81
x 1 =( 3 + 9) / 4 = 3
x 2 = ( 3 - 9) / 4 = -1,5
ответ: 3 и -1,5
1) 5x - x^2 = 0
x(5 - x) = 0
x1 = 0
5-x = 0
-x = -5
x2 = 5
ответ: 0 и 5.
2) 2x^2 - 3x - 9 = 0
D = (-3)^2 - 4*2*(-9) = 9 + 72 = 81
x 1 =( 3 + 9) / 4 = 3
x 2 = ( 3 - 9) / 4 = -1,5
ответ: 3 и -1,5