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Factorise x^2+3x+4 without the use of quadratic formula

We use the form ax^2+bx+cTo factorise we need to put the equation into 2 bracketsThese 2 brackets will be in the form (x+k)(x+j) where k and j are to be foundWe need to find a combination of k and j for whic...
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Answered by William C. • Maths tutor
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Deberíamos legalizar el matrimonio homosexual?

We should begin this question first by introducing the concept, adding clarity and showing the marker that you understand the issues at hand. This is then followed by stating your view, using a subjunctive c...
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Answered by Noah T. • Spanish tutor
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Can you explain the different types of protein structure? (primary, secondary, tertiary and quaternary)

The primary structure of a protein is the sequence of amino acids found in the polypeptide chains, this sequence determines the shape and properties of the protein.The secondary structure of a protein is the...
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Answered by Flora B. • Biology tutor
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What are Van der Waal forces ?

Van der Vaal forces are temporarily induced dipole forces. At any given time, the density of electrons in 1 atom will repel the electrons in another closely located atom, creating a dipole. Van der waal forc...
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Answered by Saron T. • Chemistry tutor
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(a) (i) Give a biological molecule that contains: 1. nitrogen 2. phosphorous (ii) Describe the role of microorganisms in producing nitrates from the remains of dead organims.

(i) 1. amino acid 2. DNA(ii) Decomposer microrganisms break down dead material into ammonia. Ammonia is then converted into nitrite and then oxidised to nitrate by nitrifying bacteria. The process is known a...
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Answered by Alice S. • Biology tutor
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