y9. Algebra. Indices Rules

Indices provides us with a nice quick way of doing calculations

So instead of doing (y x y x y x y) x (y x y x y), we can do y4 x y3.

We need to carefully memorise the indices rules for:

ya x yb and ya ÷ yb and (ya)b and y-a

(although we memorise these, they are logical and we could work them out ourselves if we forgot them).

Let’s try some examples with the teacher:

Let’s try using these rules in the following questions (exercise 2B on pages 22 and 23 of the textbook:

Here are the answers to the questions above.

Use those that you got wrong as a learning guide of the things you need to focus on or possibly restudy:

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