Factor the polynomial completely using the trial and error method.15x2 + 4xy - 4y2
A. (15x + 2y)(x - 2y)
B. prime
C. (3x - 2y)(5x + 2y)
D. (3x + 2y)(5x - 2y)
Answer: D
Mathematics
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The equation of an ellipse is given. Put the equation in standard form and sketch the ellipse.(x + 1)2 + 4y2 = 4
A. 
+ y2 = 1
B. 
+ y2 = 1
C. (x + 1)2 + 
= 1
D. (x + 1)2 + 
= 1
Mathematics
Find the exact value of the expression. Do not use a calculator.tan 
+ tan 
A. 0
B. 
C. 
D. 
Mathematics
Determine the phase shift of the function.y = 5 cos 
A. 
units to the right
B. ? units to the left
C. 5? units to the right
D. 
units to the left
Mathematics
Simplify. Write your answer in the form a + bi, where a and b are real numbers.(7 - 2i) + (2 + 8i)
A. -9 - 6i B. 9 - 6i C. -9 + 6i D. 9 + 6i
Mathematics