Solve the equation by completing the square.x2 - 4x - 7 = 0
A. {-2 - 
, -2 + 
}
B. {2 - 
, 2 + 
}
C. {4 - 
, 4 + 
}
D. {2 - 
, 2 + 
}
Answer: B
Mathematics
You might also like to view...
Determine if the function f defined by the set of ordered pairs has an inverse. If so, find the inverse.{(3, -5), (5, -3), (9, 2), (-9, -2)}
A. {(-2, 9), (9, 5), (-5, 3), (2, -9)} B. {(-2, 9), (-3, 5), (-5, 5), (2, -9)} C. {(-5, 3), (-3, 5), (2, 9), (-2, -9)} D. No inverse
Mathematics
Evaluate the function.Given that f(x) = 
, find f(r - 3).
A. 
B. 
C. 
D. 
Mathematics
Write an equation for a function whose graph fits the given description.The graph of f(x) = x2 is vertically stretched by a factor of 3, and the resulting graph is reflected across the x-axis.
A. f(x) = 3x2 B. f(x) = 3(x - 3)x2 C. f(x) = -3x2 D. f(x) = (x - 3)2
Mathematics
Change the number 
to base ten.
?
A. 519 B. 239 C. 2,856 D. 231 E. 400
Mathematics