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x²+4x-21= 0,  This can be factorised into brackets as shown: (x+2)² - 4 - 21 = 0 SImplified, so all x's are on one side of the equation: (x+2)² = 25, Removing square root,...

dy/dx= (2 * 8)x^(2-1) +4 = 16x + 4

There are two key pieces of terminology that it is important to understand with this question; genotype and phenotype. All sexual organisms inherit a mix of genes from th...

Expiration is a passive process. It happens due to relaxation, not contraction, of the muscles of the chest. As well as the elastic recoil of the lungs. Both of these processes do not require energy and h...

Students are often confronted with the choice between a thematic based and a formal based question in examinations. In my experience of tutoring, students often prefer to tackle the thematic question, bel...