Factor the trinomial completely. If the trinomial cannot be factored, say it is prime.x2 - 10xy + 21y2
A. (x - 7y)(x + 3y)
B. (x + 7y)(x + 3y)
C. (x + 7y)(x - 3y)
D. (x - 7y)(x - 3y)
Answer: D
Mathematics
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Rationalize the denominator and simplify. Assume that all variables represent positive real numbers.
A. 9
+ 45
B. 9
- 45
C. 9
- 5
D. 
Mathematics
Evaluate the expression.71
A. 7
B. 1
C. -7
D. 
Mathematics
Solve the equation by factoring.2x2 = -27x - 81
A. x = -9, -18
B. x = - 
, -9
C. x = 9, 
D. x = 9, - 
Mathematics
Determine any local or absolute extrema as indicated.Determine graphically the local extrema of f(x) = -3x2/3 + 4.
A. Local maximum: 0; no local minimum B. No local maximum; local minimum: 4 C. Local maximum: 4; local minimum: -? D. Local maximum: 4; no local minimum
Mathematics