Solve the equation by completing the square.x2 + 4x = 9
A. {-2 ± 
}
B. {-1 ± 
}
C. {2 + 
}
D. {-2 ± 2
}
Answer: A
Mathematics
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Find the Cartesian coordinates of the given point.
A. 
B. 
C. 
D. 
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Find the second derivative.y = 7x4 - 7x2 + 5
A. 84x2 - 14x B. 84x2 - 14 C. 28x2 - 14 D. 28x2 - 14x
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Using the addition/subtraction method, find the value of x and y to satisfy the following equations: x - 5y = 4; 2x - 3y = -6
a. x = 6 y = 2 b. x = -6 y = -2 c. x = -2 y = -6 d. x = 2 y = 6 e. x = -2 y = -2
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Rationalize the denominator. Assume variables represent non-negative values.
A. 11
B. 
C. 36
D. 
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