Find, using algebra, all the real solutions to the equation
c2=27cc^2 = 27\sqrt{c}c2=27c
d4−13d2−48=0d^4 - 13d^2 - 48 = 0d4−13d2−48=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.