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This expression is in the form of ax^2 + bx + c, so you need to find two numbers which multiply to get ac and add to make b.
Step 1: Here a is not = 1, so you need to take out the highest common fact...

Weathering is the physical or chemical break down of rock or soil in the place where the rock/soil is located - called 'in situ'. No material is transported when an in situ rock is weathered, however its ...

This is an example of ionic bonding. The sodium atom loses an electron to become a positive ion . This electron is then gained by the chlorine atom which becomes a negative ion. These two ions then form s...