Express 26x−152^{6x-15}26x−15 in the form 8y8^y8y , giving y y\,y in the form ax+bax + bax+b , where a a\,a and b b\,b are constants.
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.