For all integers a and b, a%b = (a + b)(a - b). If 10%x = 19, then which of the following could be a value of x?
Pick one:
A) -9
B) -8
C) 2
D) 3
E) 6
10%x = (10+x)(10-x)   100-x^2 = 19   x^2 = 81   x=-9,9   -9ns: -9
<result>A</result>
For all integers a and b, a%b = (a + b)(a - b). If 10%x = 19, then which of the following could be a value of x?