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Expand and Simplify: (x+2)(x+3)(x−3)

(x+2)(x+3)(x−3)(x 2 + 3x + 2x + 6)(x - 3) : Step 1 is to expand the first two brackets. (x 2 + 5x + 6)(x - 3) : Step two is to simplify the quadratic. x 3 -3x 2 +5x 2 -15x+6x-18 : Then expand the quadratic w...
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Answered by Alex H. • Maths tutor
9997 Views

How do I calculate rate coefficient units?

For any rate equation, the units have to be equal on either side of the equation. The rate of reaction always has the units mol dm -3 s -1 , and the concentration species in the equation typically have units...
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Answered by Frances R. • Chemistry tutor
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How do I start my essay?

Your introduction should always be a few sentences long, and should address the question directly. A good example of a question is 'How does Shakespeare present the theme of ambition in Macbeth?' For this qu...
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MEdical school interview question- Describe this image to me

Remember to stay calm, don't worry about the time constraints. Take a second to think about what you are going to say. The aim of this station is to examine your communication skills.Start with the obvious e...
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Let n be an integer greater than 1. Prove that n^2 - 2 - (n-2)^2 is an even number.

To show a number N is even, we must be able to express it in the form N = 2x for some other whole number x. Let's try to manipulate the given expression to see if we can put it in this form. By expanding the...
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Answered by Sam L. • Maths tutor
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