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Maths
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factorise x^2+10x+21

firstly the largest power is x^2 so when factorising we know that both brackets must involve an x plus or minus a number.

next we look at the 21 and we need two numbers that multiply toge...

RC
Answered by Ross C. Maths tutor
20962 Views

How do you simplify numbers with powers?

This is your example problem: (m4)3 ​First of all remember what a single power means. So:m4 = m x m x m x mThis must mean that:(m4)3 = m4 ...

MS
Answered by Maddie S. Maths tutor
9181 Views

How do I add decimal numbers?

Adding decimal numbers is done exactly the same as normal numbers: the column method.When you have 2 decimal numbers to add together the most important thing is to line up the decimal points (dots) so tha...

MS
Answered by Maddie S. Maths tutor
4301 Views

How should I present my working out?

Presenting your working out is extremely important because it's makes the examiners jobs easier, keeping them happy.One thing you should aim to do is not write too small, try and use all the space you're ...

MS
Answered by Maddie S. Maths tutor
4742 Views

Find the positive value of x such that log (x) 64 = 2

Find the positive value of x such that logx64 = 2
Using the logarithm rules, we know that we can rearrange the given equation into the form:
x2 = 64
Knowing this, we s...

SG
Answered by Santiago G. Maths tutor
18670 Views

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