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Solve the following quadratic equation: 2x^2 - 5x - 3 = 0

Firstly, we need to factorise the equation:We can see (and are told) that the equation is quadratic and is therefore of the form ax^2 + bx + c. In our case, a=2, b=-5 and c=-3. We therefore expect two pairs ...
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Answered by Jacob A. • Maths tutor
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What is the consequence of lung fibrosis on gaseous exchange?

Fibrosis is the formation of scar tissue due to injury of the alveolar walls (small sacs at the end of bronchioles that are responsible for gaseous exchange), from smoking or other small particles. Due to th...
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Answered by Stephen A. • Biology tutor
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How do I write a good introduction for an essay?

When writing an introduction it is a good idea to stick to a clear three-part structure. Let's take the following example of an essay question: How did the role of women in Britain change during World War II...
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Answered by Ana Maria M. • History tutor
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Solve the quadratic equation 4x^2 - 5x -6 = 0

First factorise the equation : you need to find two value which multiply to give (4 x -6) = -24 and add to equal -5,these two numbers are -8 and 3. Then write the equation as follows:4x 2 - 8x +3x - 6 =0 We ...
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Answered by Katie S. • Maths tutor
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What is the difference between these two sentences, and which one is correct: 1) La gente quiere que haya más agua. 2) La gente quieren que hay más agua.

This question tests the student's knowledge of the use of singular and plural pronouns, as well as the subjunctive. La gente (the people) is singular, so should be followed by a singular verb, as seen in sen...
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Answered by David D. • Spanish tutor
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