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I struggle to simplify the following equation: (see answer)

3l²mn + nl²m - 5mn²l + l²nm + 2n²ml - mn²
The first step is to ask yourself if there is anything that could help you simplify the equ...

Answered by Luc S. • Maths tutor

3507 Views

When do you use que and when do you use qui?

Que is used when talking about the object of the sentence, which means the thing which is having something done to it. For example, "la personne que j'ai vue." Here,

Answered by Harvey B. • French tutor

2258 Views

What is the difference between an exothermic and endothermic reaction?

Exothermic = A reaction that transfers energy to its souroundings therefore the temperature of the sourounding increases (gets hotter). Can you think of an example? E.g. combustion, neutralisation. As hea...

Answered by Priscilla E. • Chemistry tutor

4112 Views

What is the best way to memorise things for an exam?

Everyone revises differently, but I believe that the most efficient revision methods are active, rather than just reading notes. If you are a visual learner, my top tip would be making posters to put up a...

Answered by Anna M. • Biology tutor

3076 Views

Outline animal studies in relation to attachment.

Harlow conducted a study into attachment using 8 Rhesus monkeys over a time period of 6 months. He place them in a cage with a 'mother' covered in cloth to represent a caring mother whilst also next to a ...

Answered by Ella P. • Psychology tutor

4115 Views