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If (m+8)(x^2)+m=7-8x has two real roots show that (m+9)(m-8)<0 where m is an arbitrary constant

For this we are going to test our knowledge of discriminats and factorisation. Firstly we will format the equation as (m+8)x 2 +8x+(m-7)=0From here we can see it takes the form ax 2 +bx+c, and as we know the...
MJ
Answered by Marcus J. • Maths tutor
5446 Views

What are cases?

Every word has a function in a sentence. Sometimes, we can take words away and the sentence still makes sense. However, at other times, some words are essential for the sentence to not sound 'odd.' Say the s...
ML
Answered by Marcus L. • German tutor
4880 Views

But how can we be sure that is what the author intended?

That's a really interesting point to raise. In short, I don't think we can, especially if the author has passed away. Looking at the text though, there are definitely hints pointing us to a certain message, ...
ML
6076 Views

What is meant by the term cross-media?

Cross-media refers to large media texts which are present on different media platforms simultaneously. The mix of each of these media forms contributed to the overall media text. For example, BBC News is a c...
LF
10097 Views

How can I improve on my listening skills?

Some of the listening questions can be tricky! The best thing to do is to practice at home. Find a playlist of classical music on spotify or youtube and put it on shuffle. Then try and write down as much as ...
LF
Answered by Laura F. • Music tutor
6751 Views