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To work out the number of roots a qudratic ax2+bx+c=0 you need to compute the discriminant (b2-4ac).
If the discrimant is less than 0, then the quadratic has no re...
The area of a triangle is the (1/2) x (base x the height).
The main methods of differentiation you need to know at A level are the chain rule, the product rule and the quotient rule.
The chain rule should be used when the eqation is a function of...
A greenhouse gas is one which absorbs infrared radiation from the Earth and re-radiates it, increasing the surface temperature of the Earth. Normally these molecules are non-symmetrical such as triflur...
Allicin has antimicrobial properties and can therefore protect garlic from fungal and bacterial infections and is coded for in the DNA of the garlic by an allele.
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