Test 3 MAT 1101 Spring 2009 Name ________________________
Simplify all answers and show your work!
1) When we have a variable with an exponent raised to another exponent, what do we do with those
exponents? (Ex: (x3)2 )_____________________________________________________________
2) To add and subtract fractions, they must have a _________________________________________.
3 ) Exponents are a shortcut for repeated ______________________________________.
4) Why can we not simplify 4x – 5y any further? __________________________________________
_________________________________________________________________________________.
5) Combine like terms: 4x2 – 5x + 3x – 2x2 + 9 + 12
6) Add: (5x4 + 3x + 8) + (6x4 + 21x – 5) 7) Subtract: (8x2 – x – 5) – (4x2 – 5x + 6)
Simplify the following:
8) 54
23
15
25
−
−
yx
yx 9)
3
92
75
2
yx
yx 10) 462 )3( −− yx
11) 2
5
4
−
12) 2 4 • 5 – 3 • 5 5 • 2 – 1 13) 1178 −
•• xxx
Multiply the following:
14) 3x2y(2xy2 – 3x3y3 + xy) 15) (2x – 3)(3x + 2) 16) (3x – 4)(2x2 + 5x + 7)
