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How can i use completing the square to factorise and solve equations

This method will only work if your x term is divisible by 2. For example x 2 + 6x + 12. You then use the halved x term (e.g. 3x) to complete the square. The beginning of your factorisation is now (x + 3) 2 ....
NS
Answered by Natalie S. • Maths tutor
5083 Views

How does Haemoglobin work?

Haemoglobin is a protein made up of 4 sub-units. Each sub-unit has a molecule of un-oxygenated Iron. Oxygen covalently bonds to the Iron and is thereby carried by the blood as Oxy-haemoglobin. Oxy-haemoglobi...
CJ
Answered by Conor J. • Biology tutor
11501 Views

Describe the difference in boiling point, colour and viscosity between the fuel oil and gasoline fractions.

The fuel oil fraction has a higher boiling point. It is also dark brown in colour while the gasoline fraction is yellow. It is also more viscous (thicker and flows less easily) due to the fuel oil molecules ...
JJ
23836 Views

How do you form the future tense in French?

The future tense is formed by taking the infinitive as the stem, and adding on the appropriate ending based on the pronoun .Firstly, we take the infinitive, in this case we will use regarder- ( to watch ) We...
SK
Answered by Simran K. • French tutor
2563 Views

Define an organ

A group of similar tissues that work together to perform a particular function.
JJ
Answered by Jonathan J. • Biology tutor
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