If 3 is one solution of the equation x^2 + 3x + k = 10, where k is a constant, what is the other solution?	Choose the most appropriate option:
A) -7	B) -6	C) -3	D) 1	E) 6
The phrase “3 is one solution of the equation” means that one value of x is 3. Thus, we first must plug 3 for x into the given equation to determine the value of k. So we have   3^2 + (3)(3) + k = 10   9 + 9 + k = 10   18 + k = 10   k = -8   Next we plug -8 into the given equation for k and then solve for x.   x^2 + 3x – 8 = 10   x^2 + 3x – 18 = 0   (x+6)(x-3) = 0   x = -6 or x = 3   Thus, -6 is the other solution. Answer -6.
<result>B</result>
If 3 is one solution of the equation x^2 + 3x + k = 10, where k is a constant, what is the other solution?