Look at the function below:
y=(x−4.4)(x−2.3)
Then determine for which values of x the following is true:
f(x) > 0
To solve this problem, we need to analyze where the expression (x−4.4)(x−2.3) is greater than zero. We have two roots, x=4.4 and x=2.3, which divide the number line into three intervals: x<2.3, 2.3<x<4.4, and x>4.4.
Let's check these intervals:
- For x<2.3, both (x−4.4) and (x−2.3) are negative, resulting in a positive product.
- For 2.3<x<4.4, (x−4.4) is negative and (x−2.3) is positive, resulting in a negative product.
- For x>4.4, both (x−4.4) and (x−2.3) are positive, resulting in a positive product.
Thus, the expression (x−4.4)(x−2.3)>0 holds in the intervals x<2.3 and x>4.4.
Therefore, the solution is x>4.4 or x<2.3.