Solve the equation
x+18=x2 x + \sqrt{18} = x\sqrt{2} x+18=x2writing the answer as a surd in its simplest form.
Solve the equation
162x−1=22 16^{2x-1} = 2\sqrt{2} 162x−1=22134 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.