SOLUTION: How do I multiply (x - 10) (x+9)? I'm lost with how to figure these out. Thank you.

Question 90298: How do I multiply (x - 10) (x+9)?
I'm lost with how to figure these out. Thank you.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the given expression

In order to multiply this, we need to FOIL the two parenthesis

When you FOIL, you multiply the terms in this order:
F-First (i.e. you multiply the first terms in each parenthesis which in this case are and )
O-Outer (i.e. you multiply the outer terms in each parenthesis which in this case are and )
I-Inner (i.e. you multiply the inner terms in each parenthesis which in this case are and )
L-Last (i.e. you multiply the last terms in each parenthesis which in this case are and )

So lets multiply the first terms:
multiply and to get

So lets multiply the outer terms:
multiply and to get

So lets multiply the inner terms:
multiply and to get

So lets multiply the last terms:
multiply and to get

Now lets put all the multiplied terms together

Now combine like terms

So the expression

FOILs to:

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