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£600 includes 20% VAT Therefore £600 is 100% of original price + 20% from VAT, meaning £600 is a 120% price increase in accordance to original price.120% as a decimal is 1.2 - simply divide by 100 to get ...

First multiply out the bracket.x^2 = 4(x - 3)^2 then becomes x^2 = 4(x^2 - 6x + 9)Expand the right hand side further. x^2 = 4x^2 - 24x + 36Collect like terms. 3x^2 - 24x + 36 = 0The number 3 is a common f...

This is a complex question, the proof of which is unlikely to be asked at maths A-level, however the process behind the proof practices fundamental knowledge for the subject. If a student can successfully...

Well that depends on the curve, but if it is a quadratic, we can do it with the following method. We know that differentiating the equation of the curve will give us the equation of the tangent to that cu...

A triangle with two equal sides and angles is an isosceles triangle. Angle x will be shown in a diagram during the interview.