Solve: 52x+1−115(5x)−250=05^{2x+1} - 115(5^x) - 250 = 052x+1−115(5x)−250=0
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.