Андрей Лахурин
Решение уравнений. 36х^2 - 64=0 36x - x^3=0 x^3-5x^2-9x+45=0 0.01y^2-4=0
36х^2 - 64=0
36x - x^3=0
x^3-5x^2-9x+45=0
0.01y^2-4=0
36х^2 - 64=0
36x - x^3=0
x^3-5x^2-9x+45=0
0.01y^2-4=0
Ответ
36х^2 - 64=0
36x^2 = 64
x^2 = 16/9
x = + -4/3
36x - x^3=0
x*(36 - x^2) = 0
x = 0
36 - x^2 = 0 => x^2 = 36 => x = +- 6
x^3 - 5x^2 - 9x + 45 = 0
x^2 * (x - 5) - 9 * (x - 5) = 0
(x - 5) * (x^2 - 9) = 0
x - 5 = 0 => x = 5
x^2 - 9 = 0 => x^2 = 9 => x = +- 3
0.01y^2 - 4 = 0
y^2 - 400 = 0
y^2 = 400
y = + -20