Show that 7+154−15\displaystyle \frac{7 + \sqrt{15}}{4 - \sqrt{15}}4−157+15 can be written as 43+111543 + 11\sqrt{15}43+1115
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.