madelein51301
12.10.2020 •
Mathematics
Billy throws a ball upward from his apartment balcony and the ball falls to the ground below. The height of the ball above the ground in feet is modeled by the quadratic function h(t) = -16t 2 +32t+48, where t is the time in seconds that the ball is in the air. What is the total time that the ball was in the air?
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Ответ:
(x -5)
Step-by-step explanation:
The area expression can be factored by grouping:
x^3- 5x^2+ 3x - 15
= (x^3- 5x^2)+ (3x - 15)
= x^2(x -5) +3(x -5)
= (x^2 +3)(x -5)
We recognize the first of these factors as the given width. Then the other factor must be the length.
The length of the rectangle is (x -5).