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How do you expand brackets in a quadratic equation?

To expand the brackets in a quadtratic equation you should multiply whatever is outside the bracket by that which is inside the bracket. For example: 2(x+3) First multiply the first part of the bracket with ...
DH
Answered by Dorothy H. • Maths tutor
5741 Views

Express the recurring decimal 0.2131313 as a fraction

Firstly, identify the recurring portion of the decimal. In this case, it is "13" set up an equation "x=0.2131313 You need to place the repeating section to the left of the decimal point. To do...
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Answered by Abhijit N. • Maths tutor
17592 Views

Excessive dopamine causes schizophrenia. A drug used to treat schizophrenia binds to dopamine receptors in synapses. This binding does not lead to Action potentials. How can the drug used to treat schizophrenia bind to the same receptor as dopamine?

Schizophrenia is caused by excessive dopamine production, which leads to an increase in generation of action potentials at the post synaptic membrane. Drugs used to treat schizophrenia must block binding of ...
AN
Answered by Abhijit N. • Biology tutor
4037 Views

How do you demonstrate wider reading in your exam?

The ‘Reading for Meaning’ question paper of the English Literature A2 exam, has a large emphasis on demonstrating wider reading, as well as being able to analyse unseen texts. A good way to prepare for this ...
ZR
9796 Views

Please explain air resistance.

Both air and water are made up of lots of tiny particles. When you run your hand through water, there is some resistance to motion caused by the interaction between your hand and the water particles. In a si...
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Answered by Harris V. • Physics tutor
2803 Views