2.1
Simplifying Algebraic Expressions
Term:
Examples:
Numeral Coefficient:
Examples: Circle the coefficient of each term
4 x2
3
5
x
y
2.7z
6 xy 4
Like Terms:
Terms that are not like terms are
Example: Are the terms like terms? Why or why not?
 3 and 3x
Why?
 5x and 7x
Why?
 -x2 and 4x2
Why?

1 2
x and 7x3
4
Why?

2x2y and 9yx2
Why?
Do the coefficients have to be the same for terms to be like?
Simplifying:
Examples:
7 x  3x
10y 2  4  y 2
2x  3x  5  2
7 x 2  4 x  3x 2  1
1.8y  x 3  3z  3
1 4
1
x  4  x4  2
2
4
What do we do if we have…
 7 (y + 3)
 -( y + .3z – 1 )
 9 – 3(4x + 10)
Write as an algebraic expression:
 Subtract 5x – 1 from 3x – 4
 Five times a number added to seven
 Three subtracted from nine times a number all added to six times the number
Assignment:
p.86 2-66 even, 77-80 all