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How could you sketch a graph for y=x^2-10x+21?

This is a quadratic equation. We can recall that this means the graph will have a parabolic shape. Next we need to do a little bit of manipulation to get our final bits of information. So we want to know whe...
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Answered by Farhin Y. • Maths tutor
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What's the difference between covalent and ionic bonding?

So both are examples of very strong bonding. These are strong bonds that are difficult to break. With covalent bonds, the electron are shared between atoms whereas in ionic bonds the electrons are 'taken'. A...
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Answered by Farhin Y. • Chemistry tutor
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How do you factorize a quadratic expression?

Firstly, your quadratic equation will be of the form ax 2 + bx + c where a, b and c will be numbers. Now you have to multiply a by c to get a number, say d. From this number d, you need to find 2 factors of ...
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Answered by Sachin P. • Maths tutor
3956 Views

Evaluate the idea that English Language is decaying.

The verb "decaying" in the title carries negative connotations of a change or a progression to a corrupt state, suggesting that English is deteriorating and breaking. People who may agree with this...
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Explain the all-or-nothing principle for an action potential.

In the resting state, the membrane potential of a neuron is around -70 millivolts (mV). When acted upon by a stimulus , the membrane depolarises as Na + gated ion channels open and allow sodium ions to rush ...
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Answered by Oyku C. • Biology tutor
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