Factor by grouping.20a3 - 25a2b - 16ab2 + 20b3
A. (4a + 5b)(5a2 + 4b2)
B. (4a - 5b)(5a2 - 4b2)
C. (4a - 5b)(5a2 - 4b)
D. (4a + 5b)(5a2 - 4b)
Answer: B
Mathematics
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Solve. Where appropriate, include approximations to the nearest thousandth. If no solution exists, state this.log x - log(x + 4) = 1
A. 
B. - 
C. - 
D. No solution
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Evaluate the integral by using a substitution prior to integration by parts.
A. x 
2 - 2x 
+ C
B. x 
2 + 2x 
- 2x + C
C. x 
2 - x 
+ x + C
D. x 
2 - 2x 
+ 2x + C
Mathematics
Solve the linear equation.12 - (4 - 10y) = 4(2y - 4) - 6
A. 4 B. -4 C. -15 D. 15
Mathematics
Use identities to simplify the expression. Do not use a calculator.2 cos222.5° - 1
A. 
B. 
C. 
D. 
Mathematics