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Factorise and solve the quadratic equation x^2 + 6x + 8 = 0

Theory Problems like this need to be broken down into steps: i) Factorise, ii) solve and iii) check. The aim of this question is to find values of x which satisfy the quadratic equation, i.e. when we substit...
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Answered by Tutor87306 D. • Maths tutor
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To what extent was the policy of appeasement inevitable in the late 1930s?

Given the prevailing reformation of the balance of power in Europe due to the rise of nationalism and the ongoing Spanish Civil War from 1936-1939 which reflected a microcosm of interwar Europe, the Great Po...
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Answered by Dionysia M. • History tutor
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Why is the control of insulin called "negative" feedback? How does it work?

Negative is a slightly confusing term, as it seems to imply that the control is bad, when in reality it is vital to being alive! Negative in this sense is used in a mathematical way, meaning "removing&q...
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Answered by Andrew P. • Biology tutor
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Describe the steps that occur in allopatric speciation or geographical speciation.

Before speciation occurs we have a population of individuals of the same species that can freely and successfuly mate with each other. In allopatric speciation a geographical barrier forms (a mountain range ...
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Answered by Arthur A. • Biology tutor
9843 Views

How should I approach a long piece of writing to be able to answer questions about it?

The best way to approach this is to skim-read the piece first, highlighting/making a note of what you think are the most important concepts or issues raised. Don't stress if you don't understand some of the ...
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Answered by Andrea C. • Italian tutor
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