Solve by completing the square.x2 - 4x - 21 = 0
A. -3, -18
B. -3, 7
C. -7, 3
D. ± 
Answer: B
Mathematics
You might also like to view...
Solve the equation for the unknown variable.log5d = 3
A. d = 8 B. d = 243 C. d = 125 D. d = 15
Mathematics
Without graphing, find the maximum value or minimum value.f(x) = -(x + 5)2 - 7
A. 4 B. -7 C. 6 D. 5
Mathematics
Solve.11x + 2x = 65
A. 
B. 52
C. 5
D. 
Mathematics
Point P is on the terminal side of ?. Evaluate the six trigonometric functions for ?. If the function is undefined, write "undefined."P(-15, 36); find sin ?.
A. - 
B. 
C. 
D. - 
Mathematics