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Solve x^2 + 4x + 4 = 0

To solve this equation we have two different methods: 1) We can solve this method 'by hand' and is done by knowing how to factorise the quadratic and is done by looking at the equation given to us to find hi...
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Answered by King Him C. • Maths tutor
5139 Views

Make x the subject of the equation y=(2(1+x))/(3x-1)

This might be hard at first, but if you work through step by step you'll get there! Start by getting rid of the fraction, multiply both sides by (3x-1) to get y(3x-1) = 2(1+x) Multiply out the brackets: 3yx-...
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Answered by Abigail C. • Maths tutor
5911 Views

An equilibrium between hydrogen and nitrogen to make ammonia. Explain what would happen to the amount of product if a) pressure was increased b) temperature was increased c) a catalyst was added. Energy change -92KJ/mol

This is quite a complicated sounding question but it is actually quite simple if you break it down! Start by writing a balanced equation for the reaction: 3H 2 (g) + N 2 (g) => 2NH 3 (g) Now you can see t...
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Answered by Abigail C. • Chemistry tutor
10998 Views

How would you approach a poetry essay?

It is absolutely imperative that you read the poem through first at least twice. I would suggest that you whisper it to yourself, even in exams, because poetry is a highly experiential literary form and this...
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Answered by Ben W. • English tutor
6672 Views

The equation of a curve is y = x^2 - 5x. Work out dy/dx

This is an example of differentiation. This can be useful in many concepts, one being finding the gradient of a line or curve at a certain point. To differentiate these types of equations, the rule is to mul...
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