Question

Explanation of why the following statement is incorrect.
(x + 3)(x -4) < 7, and explain why it is incorrect.
To solve (x + 3)(x -4) < 7, start by setting (x + 3) = 7 and (x - 4) = 7.
Now solve the inequality.
Provide a detailed explanation of why using this method to solve the inequality is incorrect.

I am not that good at math. I appreciate any help anyone cam provide. Thanks Mike...Thank you for past help

Answer 1

You can't set each part equal to 7. That only works when you set each part equal to 0. Using zero works because we know if something times something = 0 then one of the factors has to = 0.

multiply first

x2 -x -12 <7
x2 -x - 19 <0 Now, you can finish the problem.