Multiply the polynomials using the special product formulas. Express the answer as a single polynomial in standard form.(3x + 4y)(3x - 4y)
A. 6x2 - 8y2
B. 9x2 + 24xy - 16y2
C. 9x2 - 16y2
D. 9x2 - 24xy - 16y2
Answer: C
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Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.r = 
A. 
B. 
C. 
D. 
Find the vertices of the hyperbola.16x2 - 4y2 - 192x - 32y + 448 = 0
A. (-8, 4) and (-4, 4) B. (-6, 8) and (-6, 0) C. (6, 0) and (6, -8) D. (4, -4) and (8, -4)
Find the x- and y-intercepts. If no x-intercepts exist, state so. Round to two decimal places if necessary.f(x) = 2x2 - 20x + 18
A. x-intercepts (2, 0) and (
, 0); y-intercept (0,18)
B. x-intercepts (9, 0) and (- 1, 0); y-intercept (0,-18)
C. x-intercepts (9, 0) and (1, 0); y-intercept (0,18)
D. x-intercepts (2, 0) and (
, 0); y-intercept (0,-18)
Solve by the quadratic formula. If there are no real roots, say so.3x2 + 9x = -3
A. x = 
B. x = 
C. x = 
D. x = 