Solve the equation by completing the square.x2 + x -  = 0

A. {, - }
B. {}
C. {, - }
D. {, - }


Answer: C

Mathematics

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Solve the problem.Find the missing length in the following right triangle. If necessary, round to the nearest tenth. 

A. 12 cm B. 14.5 cm C. 72.5 cm D. 145 cm

Mathematics

For the given functions f and g, find the requested composite function value.f(x) = 4x + 6, g(x) = 2x2 + 1;Find (f ? f)(4).

A. 2179 B. 969 C. 94 D. 138

Mathematics

Use a graphing calculator to find the zeros of the function. Round to three decimal places.f(x) = 2.38x2 - 14.57x - 1.95

A. -0.262, 12.506 B. -0.131, 6.253 C. -6.253, 0.131 D. 0.137, 5.985

Mathematics

Solve the equation.-6n - 3 = 21

A. n = 22 B. n = -18 C. n = 4 D. n = -4

Mathematics