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Solve x^2=3(x-1)^2

To start with, we want to put this into quadratic form, where we have ax^2+bx+c=0. We notice that there are terms on both sides of the equation. So we can expand the right hand side and then bring all the te...
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Answered by Joshua U. • Maths tutor
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An internet shopping company is planning to use drones to deliver packages.During a test the drone is hovering at a constant height above the ground.The mass of the drone is 5·50 kg. The mass of the package is 1·25 kg. See questions below

a) Determine the upward force produced by the droneWe can simplify the problem by drawing a free body diagram. This allows us to analyse the forces involved. We are told the drone is stationary, meaning the ...
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Answered by Joe R. • Physics tutor
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How do I work out the exact value of a number which is expressed as an indice, for example 81^-1/4

Firstly, recall the indice rules which are applicable to the question, for example in this question we can use the rules:(x^a)^b = x^abx^-1 = 1/xx^1/2 = square root xSecondly, apply these rules to break down...
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Answered by Cameron H. • Maths tutor
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State and explain how the attraction between nuclei and outermost electrons varies across group 3 (2 marks)

Attraction between the nucleus and the outer electrons increases across a group because the proton number increases and the atomic radius decreases due to increased nuclear charge.Across a group shielding re...
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Answered by Amy D. • Chemistry tutor
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To what extent was the legacy Treaty of Versailles the main cause of the Second World War?

Thesis - The legacy and impact of the Treaty of Versailles was the main cause of the WWII, since it set the precedent for a following conflict. Despite this, the failure of collective security, the economic ...
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Answered by Vinicius S. • History tutor
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