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How do you show that (x+2) is a factor of f(x) = x^3 - 19x - 30, and then factorise f(x) completely?

A1) Showing that (x+2) is a factor of f(x). General Method: If A is a number, then (x- A) is a factor of f(x) if when x=A, f(x=A)=0 <-- This is what we want to show This is because if (x-A) is a factor of...
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Answered by Rebecca W. • Maths tutor
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Name and describe the 4 steps involved in aerobic respiration

Glycolysis- This is the first step which occurs in the cytosol. glucose broken down into pyruvate yielding 2 net atp and 2 pyruvate molecules per glucose. This is the only step in anaerobic respiration. Link...
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Answered by Uchenna O. • Biology tutor
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Why is it ineffective to tax inelastic products as a means to deter their consumption?

Define terms: An inelastic good is product for which demand does not reduce significantly as a result of an increase in price. This generally means that price increase have little impact on how much of the g...
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Answered by Uchechi O. • Economics tutor
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How is information transmitted across a chemical synapse?

By neurotransmitters. At a neuromuscular junction, the neurotransmitter is Acetylcholine released from vesicles in the pre-synaptic neurone. Receptors on the muscle cell surface bind acetylcholine in the pro...
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Answered by Uchenna O. • Biology tutor
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A solution of ethanoic acid is made by dissolving 3g of pure liquid propanoic acid in 500cm^3 water. Given the pH of the solution is 2.98, calculate Ka.

Before using numbers from the question: 1)What is pH? pH = -log[H + ] Square brackets mean concentration of H+ so we need to convert given pH to [H + ] in the weak acid coefficient 2) To find the concentrati...
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Answered by Sofia H. • Chemistry tutor
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