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Solve x^2 - 9 = 4x + 12

x 2 - 9 = 4x + 12 x 2 - 9 - 4x = 12 x 2 - 9 - 4x -12 = 0 x 2 - 4x -21 = 0 Factorise into form (x + ?)(x + ?) Factors of -21 are +7 and -3 or -7 and +3 (x + 7)(x - 3) = x 2 + 7x - 3x -21 = x 2 + 4x -21 which ...
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Answered by Kira P. • Maths tutor
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A group of 55 pupils were asked if they owned a phone or a tablet.11 people are known to own both18 said they only owned a tablet34 said they owned at least a phoneA student is picked a random, what is the probability that the student doesn’t have a phone

18/55
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Answered by Umer H. • Maths tutor
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Do the gods and goddesses in the 'Odyssey' mostly help or hinder Odysseus ?

This question would most likely be 10 marks and is asking for direct comparison.To answer the question fully you would want to pick out specific moments in the 'Odyssey' that demonstrated a god or goddess he...
EC
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How do I write a analytical paragraph for literature essay?

Firstly, you must begin with a topic sentence. This is a sentence which clearly and concisely conveys your response to the question. For example, if you are asked to explore the theme of ambition in Macbeth ...
AS
Answered by Abby S. • English tutor
8130 Views

When will I ever need to use this in real life?

Maths is something you can make use of for the rest of your life.Obviously, there are a vast number of jobs out there, such as engineering, which use mathematics everyday so if that's the sort of thing that ...
AM
Answered by Alex M. • Maths tutor
3751 Views