SOLUTION: 21. Solve the following inequality. (a + 7)(a - 5)(a - 6) > 0 A. (-7, 5) or (6, ∞) B. (-∞, -7) or (5, 6) C. (-∞, 5) D. (6, ∞)

Algebra ->  Inequalities -> SOLUTION: 21. Solve the following inequality. (a + 7)(a - 5)(a - 6) > 0 A. (-7, 5) or (6, ∞) B. (-∞, -7) or (5, 6) C. (-∞, 5) D. (6, ∞)       Log On


   

Question 444859: 21. Solve the following inequality.
(a + 7)(a - 5)(a - 6) > 0
A. (-7, 5) or (6, ∞)
B. (-∞, -7) or (5, 6)
C. (-∞, 5)
D. (6, ∞)


Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

%28a+%2B+7%29%28a+-+5%29%28a+-+6%29+%3E+0+.this is already factored, so
solutions are:
a+%2B+7+%3E+0+...=>.....a%3E+-7+...means from -7 to 0 and up
a+-5%3E+0+.....=>...a%3E+5+
a+-6%3E+0+.....=>...a%3E+6+
A. (-7, 5) or (6, ∞)