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To help the student understand how to expand the brackets I would start by splitting the equation to:3x²(x - 3) + 6x(x - 3) + 7(x - 3)I then would ask the student to expand these brackets to:3...

Palaeomagnetism deals with the past magnetic states of the earth. In the 1900's geographers were interested in the mid Atlantic ridge, its on a constructive plate margin, meaning the crust further away fr...

Rough endoplasmic reticulum, Mitochondria, Golgi apparatus

CO₂ from respiring tissues diffuses into erythrocytes (red blood cells) where it reacts with water to form carbonic acid (process catalysed by the enzyme carbonic anhydrase). The carbonic acid...

You will never get a source that tells you nothing. Often times, you will be given deliberately odd sources, just to see if you can think on your feet. In these cases, it helps to think about the context ...