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Factorise x^2 + 7x + 10

'Factorise' essentially means put into a simpler form, in this case with two sets of linear equations which would multiply out to give the quadratic equation shown above. What we are looking for to begin wit...
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Answered by David J. Maths tutor
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Given y=x^3+5x+3 find dy/dx when x=3

The question can be broken into two steps, 1) dy/dx is asking to differentiate y=x 3 +5x+3 with respect to x Differentiating we multiply by the current power and lower this powers value by 1. ( Constants dif...
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Answered by Robert L. Maths tutor
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Why does resistance increase with temperature?

So, when an electrical charge passes through a resistor, some of that electrical energy is transferred into heat, increasing the temperature. This extra energy causes the particles in the resistor to vibrate...
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Answered by Fergus F. Physics tutor
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What are emergent properties?

Multicellular organisms show emergent properties; these are properties that exist due to many different components working together. For example, your lungs work and help you breathe due to all of the cells ...
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Answered by Helen A. Biology tutor
24303 Views

How do we form the present tense endings for regular 'er', 'ar' and 'ir' verbs?

The present tense is used to describe actions that are happening in the present, and is the most commonly used tense in Spanish To form it, first you must remove the infinitive endings of the verb - er, ar a...
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Answered by Charlie A. Spanish tutor
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