1) x2 - 11x + 30 = (x - 5)(x - 6), корни: x1 = 5, x2 = 62) x2 - 21x + 110 = (x - 10)(x - 11), корни: x1 = 10, x2 = 113) 4x2 - 64 = 4(x2 - 16) = 4(x - 4)(x + 4), корни: x1 = -4, x2 = 44) 4x2 - 2x - 0.75 = 4x2 - 3x - x - 0.75 = x(4x - 3) - 0.75 = (4x - 3)(x + 0.25), корни: x1 = 3/4, x2 = -1/4
1) x2 - 11x + 30 = (x - 5)(x - 6), корни: x1 = 5, x2 = 6
2) x2 - 21x + 110 = (x - 10)(x - 11), корни: x1 = 10, x2 = 11
3) 4x2 - 64 = 4(x2 - 16) = 4(x - 4)(x + 4), корни: x1 = -4, x2 = 4
4) 4x2 - 2x - 0.75 = 4x2 - 3x - x - 0.75 = x(4x - 3) - 0.75 = (4x - 3)(x + 0.25), корни: x1 = 3/4, x2 = -1/4