Question

Найдите корни уравнения
номер 259(1;3;5)

Answer 1

1) x^2 + 7x - 60 = 0
(x + 12)(x - 5) = 0
x1 = -12; x2 = 5
3) m^2 + m - 90 = 0
(m + 10)(m - 9) = 0
m1 = -10; m2 = 9
5) 3x^2 + 32x + 80 = 0
(x + 4)(3x + 20) = 0
x1 = -4; x2 = -20/3
7) 3x^2 - 6x + 3 = 0
3(x - 1)^2 = 0
x1 = x2 = 1

Answer 2

$1)D=289; x_{1} =-12; x_{2} =5 3)D=361; x_{1} =9;x_{2}=-10 5)D=64;x_{1} =-20;x_{2}=-12$