Simplify ( -2 + i ) ( 5 + 9i )and write the answer in standard form.
a. 47 - i
b. 47 - 13i
c. -19 + 43i
d. -23 - 13i
e. -19 -13i
e. -19 -13i
Mathematics
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Find all solutions of the equation in the complex number system.x3 + 1 = 0
A. {-1}
B. {-1, 
+ 
, 
- 
}
C. {-1i, 
+ 
i, 
- 
i}
D. {-1, 
+ 
i, 
- 
i}
Mathematics
What is the domain of f(x)? What is its range?f(x) = 
+ 5
A. Domain: (-?, -3) ? (-3, ?); range: (-?, 5) B. Domain: (-?, 3) ? (3, ?); range: (-?, 5) C. Domain: (-?, 3) ? (3, ?); range: (-?, 0) D. Domain: (-?, 3) ? (3, ?); range: ( 5, ?)
Mathematics
Write the decimal in words.0.067
A. Sixty-seven hundredths B. Sixty-seven hundred-thousandths C. Sixty-seven thousandths D. Sixty-seven ten-thousandths
Mathematics
Verify the identity.tan2 x = sec2 x - sin2 x - cos2 x
What will be an ideal response?
Mathematics