Question

Simplify: `(3e)+(3e-20)`?

Answer 1

Result `=6e-20`

Explanation:

Here we have an expression `(3e)+(3e-20)`

Notice:
(i) The brackets on the first term are unnecessary

(ii) The brackets on the second are telling you to distribute the operator over the two elements. However, since this operator is `+`, these brackets are also unnecessary.

`:.` Expression `= 3e+3e-20 = 6e-20`

NB: If the operator before the second term had been `-` the brackets would have been necessary as follows:

`3e -(3e-20) = 3e-3e +20 =20`

Notice that distributing `-` over `(3e-20) -> -3e +20`