In the equation above

MATHEMATICS · Single correct · AoPS · Mathematics · Quadratic Equations - Part 1 · Quadratic Equations - Part 1

Problem

x^2+kx-14=0

In the equation above,

k

is a constant. The equation has solutions at 7 and

-2

. What is the value of

k

? (A)

-9

(B)

-5

(C) 5 (D) 9

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