不羈

Do you the conflict on Diaoyu Islands can be settled by a war.Just like the Falklands War.

If the roots of 3x^2 + (k+3)x - 12 = 0 are numerically equal but opposite in signs, find the value of k.

1. what dose it mean? (numerically equal but opposite in signs)

2. solve it, please.

Let a and b be non-zero real numbers. If the result of (a+bi)(-10+25i) is real number, find a : b.

expend (a-b)(a+b)(a^2+b^2)(a^4+b^4)(a^8+b^8)(a^16+b^16).....(a^1024+b^1024)

describe your answer simply

x-2x+3x-4x+5x-6x+.........+99x-100x=200. 解此方程,並簡述你所用的方法。