Simplify the complex rational expression.
A. 
B. 
C. 
D. 
Answer: B
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If the equation represents a hyperbola, find the center, foci, and asymptotes. If the equation represents an ellipse, find the center, vertices, and foci. If the equation represents a circle, find the center and radius. If the equation represents a parabola, find the focus and directrix. 4x2 + 9y2 + 72x - 36y + 324 = 0
A. C: (-9, 2); V: (-9, 5), (-9, -1); F: (-9, 4.2), (-9, -0.2) B. C: (-9, 2); V: (-6, 2), (-12, 2); F: (-6.8, 2), (-11.2, 2) C. C: (-9, 2); V: (-7, 2), (-11, 2); F: (-5.4, 2), (-12.6, 2) D. C: (-9,2); V: (-9, 4), (-9, 0); F: (-9, 5.6), (-9, -1.6)
Solve by the quadratic formula. If there are no real roots, say so.b2 + 
b = 
A. b = 
B. No real solution
C. b = - 
, b = -
D. b = 0, b = 
Find the slope of the line tangent to the curve at the given point.y = 9 sin x; x = 
A. 
B. 0
C. 9
D. -9
Simplify to the form a + bi.i5 + i7
A. -2 B. 2i C. 2 D. 0