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factorise the equation x^2+17x+70

Firstly, you can see from the equation that each bracket must contain an x since these multiply together to give the x 2. So you get (x..)(x..) Next, to obtain the last number of the equation you must have t...
TM
Answered by Tanush M. • Maths tutor
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How do you factorise and know if it is a difference of two squares ?

1. First you need to learn how to recognise the form: Difference of two square numbers . a 2 - 36 (a 2 is a square number and 36 is also a square number and you are getting the difference between them) To fa...
EL
Answered by Esther L. • Maths tutor
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Finding Roots of Quadratic Equations

Finding Roots of Quadratic Equations What is a root to an equation? A root to an equation is a set of value(s) that satisfy the equation and when shown graphically they are the x values at which the function...
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Answered by Alexander G. • Maths tutor
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What are the differences between decimal points and significant figures?

The total number of digits to the right of the point are known as ' decimal points ' whereas significant figures start from the first non-zero number. Note : As significant figures start from the first non-z...
NL
Answered by Niall L. • Maths tutor
84290 Views

How do I find the length of a side of a triangle using the cosine rule?

Suppose we have a triangle with 2 sides of length 4 and 5 (in any units), and the angle between those sides is 60 degrees. We want to find the length of the side opposite the 60 degree angle. Write the cosin...
AH
Answered by Angus H. • Maths tutor
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