In this question you must show detailed reasoning.
Solve the equation x(5−23)=13x(5-2\sqrt{3})=13x(5−23)=13, giving your answer in the form a+b3a+b\sqrt{3}a+b3 where a a\,a and b b\,b are positive integers.
233 exam-style questions on Edexcel A Level Maths Algebraic Expressions, covering 1.1 Index Laws, 1.2 Expanding Brackets, 1.3 Factorising, 1.4 Negative and Fractional Indices, and 1.5 Surds. Each one has a worked solution and a mark scheme showing where the marks go.