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Solve x^2 + 8x +3 = 0 by completing the square.

Using the completing the square method: 1. Notice (x+4) 2 = x 2 + 8x +16 which differs from the question by a constant 2. So we can write: x 2 + 8x + 3 = (x+4) 2 - 13 (check this yourself if you don't see it...
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Answered by Tutor21349 D. • Maths tutor
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What are the key things that should be included in a personal statement?

A good personal statement should start by being clear and outlining exactly why you want to study the course. This is an opportunity to show that you have researched the course and therefore can comment on p...
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4025 Views

What's the difference between an electrophile and a nucleophile?

It's really useful to know that 'phile' means love. Electrophiles 'love' negative charge - this means they are attracted to regions of negative charge. And as such they tend to be positively charged. Similar...
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Answered by Sophie M. • Chemistry tutor
8491 Views

Language Development/Acquisition- What are Halliday's seven functions of a child's language?

Halliday (1978) proposed that there are 7 stages or functions of a child's speech. These are as follows. Instrumental function - language that is used to fulfil a need, such as to obtain food, drink or comfo...
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226320 Views

How appropriate is the term 'restoration' when describing the reign of Charles II?

When answering this question it would be best to approach it by defining the terms in the question, in particular the term 'restoration'. 'Restoration' can be defined as the action of returning something to ...
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Answered by Tom S. • History tutor
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