start with a² part and forget the rest from example.
-4a²-a²=? Now remember - and - is adding up. so -5a², which takes out options a and b, as there are 3a² instead of 5.
now let's take ab part and forge the rest.
-2ab+6ab=? that gives us 4ab. So option c, which says 8ab, is wrong. the last number isn't really important in this case because you've already seen the rest can't be.
Zoroastrian is an old historical religion present in the 6 century times. It was proposed by prophet Zoroastrian.
His ideology put forward had a major impact on religions followed today such as the Christianity, Judaism and Islam.
Most of the teachings of these religions have similarity with the Zoroastrian culture of the 6th century. The Zoroastrian teaching supported the wester culture and thoughts by having belief on the philosophical explanation.
Is a source of international conflict because, as it falls downwind, the area in which it accumulated is not necessarily the area that will be damaged. So countries must work together to reduce the problem because they are damaging one another's environments.
