Answer:
B
Explanation:
x * ( 7 - x ) > 8
Substitute the number and if the expression is True then that number is a solution.
A substitute x=8
x * ( 7 - x ) > 8
8 * ( 7 - 8 ) > 8
8 * ( -1 ) > 8
-8 > 8
This statement is FALSE so the number is not a solution of the inequality.
B substitute x=2
x * ( 7 - x ) > 8
2 * ( 7 - 2 ) > 8
2 * ( 5 ) > 8
10 > 8
This statement is True so the number is a solution of the inequality.
C substitute x=-1
x * ( 7 - x ) > 8
-1 * ( 7 - -1 ) > 8
-1 * ( 7 + 1 ) > 8
-8 > 8
This statement is FALSE so the number is not a solution of the inequality.
D substitute x=0
x * ( 7 - x ) > 8
0 * ( 7 - 0 ) > 8
0 * ( 7 ) > 8
0 > 8
This statement is FALSE so the number is not a solution of the inequality.