Find the product and write the result in standard form.(9 + 3i)(9 - 3i)
A. 90
B. 72
C. 81 - 9i2
D. 81 - 9i
Answer: A
Mathematics
You might also like to view...
Simplify the complex fraction.
A. 
B. 
C. 
D. -1
Mathematics
Solve the formula for the indicated letter. Assume that all variables represent nonnegative numbers.S = 
gt2 for t
A. t = 2gS
B. t = 
C. t = 
D. t = 2
Mathematics
Simplify the expression.(3-2)-1
A. 3
B. 
C. 
D. 9
Mathematics
Solve the variation problem.According to Ohm's law, the electric current, in amperes (A), in a circuit varies directly as the voltage, in volts (V). When 18 V are applied, the current is 2 A. What is the current when 25 V are applied?
A. 18.25 A B. 45 A C. 2.78 A D. 9 A
Mathematics