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Expressions and Equations

Problems

Simplifying Expressions

Solving Equations by Plugging in Values

Problem : How many terms do the following expressions have?
a) 17x 2 + 4xy + 2y
b) 2y + 4 - 6y + x 2
c) 8y 6
d) 3xyz + 4yz + 2xz + z 2 - xz

a) 3
b) 4
c) 1
d) 5

Problem : In the expression 5x + 3x 2 - xy - 5z + z 3 , what is the coefficient of...
a) x ?
b) z ?
c) z 3 ?
d) x 2 ?
e) xy ?
f) z 2 ?

a) 5
b) -5
c) 1
d) 3
e) -1
f) 0

Problem : What is the constant in the expression 4x 2 + 5 + x ?

5

Problem : Simplify 5x 2 + x 3 -4x 2 + x + 6 - 4 + x 2 - 3x by combining like terms.

x 3 +2x 2 - 2x + 2

Problem : Simplify 7y + 14xy - 3y - 4y - 6x 2 - 2xy by combining like terms.

-6x 2 + 12xy

Problem : Simplify 14 + x + 8x 2 -6 - x + 5x 2 by combining like terms.

13x 2 - x + 8

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