In this question you must show detailed reasoning.
Solve the equation x(4−2)=28x(4-\sqrt{2})=28x(4−2)=28, giving your answer in the form a+b2a+b\sqrt{2}a+b2 where a a\,a and b b\,b are positive integers.
134 exam-style questions on Edexcel AS 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.