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Students should be led to understand that they can achieve top grades by coming down on either side of the argument - indeed, the surest path to a poor result in this situation is to equivocate and...

(X-3)(x-5)=0Use F.O.I.LFirst x multiplied by x gives x²outer x multiplied by -5 gives -5xinner x multiplied by -3 gives -3xlast -5x-3 gives +15combining we get x²-8x+15=0the quadrati...

Firstly the adaptive immune response is the antigen specific response the body uses against free antigens or infected cells. It relies on the highly specialised lymphocytes, T-cells and B-cells, which are...

"tu" is a far more relaxed and friendly way of saying "you" in French. It can be used for friends and family. Don't use it with an adult or someone you don't know unless they have to...

Stationary points are points where the gradient of a function is equal to 0. In this question the product rule can be used to find the gradient of the given function. The product rule is given by u'v+uv'...