решите уравнения:
x^2-70x=0
25-x^2=0

x^2 - 70x = 0 x(x - 70) = 0x_1 = 0     x_2 = 7025 - x^2 = 0x^2 - 25 = 0(x-5)(x+5) = 0x - 5  = 0    x + 5 = 0x_1 = 5      x_2 = -5