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How do I write a really good History essay?

It can seem pretty daunting when you sit down to write a History essay, but these tips will hopefully make it a lot easier. Planning Make sure you plan your essays before you write them. In timed conditions,...
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Answered by Ruby K. • History tutor
9072 Views

Factorise fully 3*a^3*b +12*a^2*b^2 + 9*a^5*b^3

To factorise 3a 3 b + 12a 2 b 2 + 9a 5 b 3 , we need to deal with like elements together.Start with the integers. The highest common factor of 3, 12, and 9 is 3. Therefore we factor out the 3 and the express...
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Answered by Melissa P. • Maths tutor
5353 Views

Find the highest common factor of 432 and 522

To do this, we first need to calculate the prime factorisations of 432 and 522, that is to say we need to break the numbers down into their prime factors.Let's start with 432. 432 = 2 x 216432 = 2 x ( 2 x 10...
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Answered by Melissa P. • Maths tutor
15467 Views

Can you explain the formula method for solving quadratic equations?

We can use the formula method (for solving quadratic equations) to find 'roots' or values of x that satisfy or 'work out' for a given quadratic equation of an unknown variable (say x.) The formula is:x=-b(+o...
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Answered by Daniel M. • Maths tutor
11747 Views

What is the equation for complete combustion and what does it require?

The equation for complete combustion is: hyrdocarbon + oxygen -> water + carbon dioxide A plentiful supply of oxygen is required in order to ensure complete combustion.
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