### Algebra: Variables

### Sum and product of variables

Product

The expression #3\times x \times y# is the \[3\times x \times y = 3 \cdot x \cdot y\] We can also omit the dot: \[3 \cdot x \cdot y = 3xy\] #3#, #x# and #y# are called the |

Sum

The expression #x+3y# is the The term #x# can be seen as the product #1\cdot x#. The term #3y# is the product #3\cdot y#. |

The terms of #9\cdot u-7\cdot v# are: \[9\cdot u \text{ and } \left(-7\right)\cdot v\]

Unlock full access

Teacher access

Request a demo account. We will help you get started with our digital learning environment.

Student access

Is your university not a partner?
Get access to our courses via

Or visit omptest.org if jou are taking an OMPT exam.

**Pass Your Math**independent of your university. See pricing and more.Or visit omptest.org if jou are taking an OMPT exam.