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December 21, 2014

December 21, 2014

Posted by **Kristen** on Tuesday, January 15, 2013 at 8:47am.

1. Factor the trinomial completely. 10x^2 + 11x-6

a. (2x+3)(5x-2)

b. (2x-3)(5x+2)

c. (10x+3)(x-2)

d. (2x+1)(5x-6)

2. Compute as indicated. Write answers in lowest terms. 9/2s+9/4s^2

a. 9s+9/4s^2

b. 27/2s

c. 18s+9/4s^2

d. 27/4s^2

3. Simplify the expression, assuming that the variable can represent any real number -(8a^3/27)^4/3

a. - 16a^4/81

b. - 81/16a^4

c. 16a^4/81

d. 81/16a^4

4. Use the properties of exponents to simplify the expression. Write the answer using positive exponents only.. (a*b^-4/c^-7)^3

a. ab^12/c^21

b. b^12/a^3c^21

c. b^12c^7/a^3

d. ab^12c^7

5. Reduce to lowest terms x-3/3-x

a. 1

b. -1

c. x/3+3/x

d. x/3-3/x

- College Algebra -
**Praphul**, Tuesday, January 15, 2013 at 9:11am1.10x^2+15x-4x-6 b should be split in such

a way that the product is equal to ac and the sum should be equal to b.

5x(2x+3)-2(2x+3)

(2x+3)(5x-2)

a

2.Find the LCM

(18s+9)/4s^2

c

3.[(2a/3)^3]^4/3

both 3 s get cancelled and we have 16a^4/81

c

4. Problem is not clear regarding powers and signs.

5.Take out minus sign from Numeratorand we will have -1 while everything gets cancelled

- College Algebra -
**bobpursley**, Tuesday, January 15, 2013 at 9:19am5, Doesn't x-3=-(3-x) ?

4. look at the a term a^3 has to appear in the answer. No answer is correct. Now if the problem is ((ab)^-4)c^-7)^3, then you have to have a^-12 or 1/a^12. Again, no answer is correct.

3. what is -cubrt(8a^3/27) ? now raise that to the 4th power (square it twice).

2. lowest term is 9s/2 (1+s2)

1. Let x=1. compute the trinomial. Now mentally check each answer with x=1. Which is the same?

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