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Solve x^2 – 6x – 8 = 0 Write your answer in the form a ± √ b where a and b are integers. (Higher tier paper)

To solve this equation we cant use the PSF method, as nothing multiplies to -8 and adds to -6. (Also in the question it says the answer will be in a±b which is normally what you get when you can't factorise)...
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Answered by Alex D. • Maths tutor
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Describe the process of protein synthesis.

A copy of the gene to be coded in DNA is made from messenger RNA (mRNA). mRNA travels out of the nucleus and attaches to a ribosome. The ribosome joins amino acids together in the order determined by mRNA.
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Answered by Arjun T. • Biology tutor
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What is meant by Pathetic Fallacy?

Pathetic Fallacy is where the outside world relfects the character's thoughts or feelings. i.e. A storm raged on beyond the vale. This could signify anger or even anxiety.
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What is the circle of fifths?

The Circle of Fifths is a harmonic system which uses the interval of a 5th, i.e. C to G to help us identify keys and other important musical factors. The Circle of Fifths can be laid out in many ways but thi...
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Answered by Elan R. • Music tutor
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Solve the simultaneous equations 2x - y = 13, x - 2y = 11

In order to solve simultaneous equations, you need to make either terms of x (i.e. '2x') or terms of y (i.e. 'y') in equation (1) and equation (2) equal. To do this, multiply either (1) or (2) as shown below...
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Answered by Graciella M. • Maths tutor
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