With this hidden iOS 18 feature, you don't have to open your Calculator app to solve tricky equations, and you won't have to open Google to look up a conversion rate, either. Instead, you can just ...

Laws of logarithms and exponents Revise what logarithms are and how to use the 'log' buttons on a scientific calculator Solving polynomial equations The nature and co-ordinates of roots can be ...

One of the most common methods used to solve equations is the balance method. Imagine an equation as a set of scales. The scales will stay in balance as long as the same operation (addition ...