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adrianaglass12
08.10.2019 •
Mathematics
1. let f(x) = 7x2 – 5x + 3 and g(x) = 2x2 + 4x – 6.
part a: find f(x) + g(x)
part b: find f(x) – g(x)
part c: find g(x) – f(x)
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Ответ:
f(x) + g(x) =![9x^{2} - x - 3](/tpl/images/0298/8601/f352d.png)
f(x) - g(x) =![5x^{2} - 9x + 9](/tpl/images/0298/8601/b5c0c.png)
g(x) - f(x) =![-5x^{2} + 9x - 9](/tpl/images/0298/8601/07172.png)
Step-by-step explanation:
Case 1:
f(x) + g(x)
=![7x^{2} - 5x + 3 + (2x^{2} + 4x - 6)](/tpl/images/0298/8601/090f5.png)
=![7x^{2} - 5x + 3 + (2x^{2} + 4x - 6)](/tpl/images/0298/8601/090f5.png)
=![9x^{2} - x - 3](/tpl/images/0298/8601/f352d.png)
Case 2:
f(x) - g(x)
=![7x^{2} - 5x + 3 - (2x^{2} + 4x - 6)](/tpl/images/0298/8601/5e201.png)
=![7x^{2} - 5x + 3 - 2x^{2} - 4x + 6](/tpl/images/0298/8601/e4b83.png)
=![5x^{2} - 9x + 9](/tpl/images/0298/8601/b5c0c.png)
Case3:
g(x) - f(x)
=![2x^{2} + 4x - 6 - (7x^{2} - 5x + 3)](/tpl/images/0298/8601/02ca4.png)
=![2x^{2} + 4x - 6 - 7x^{2} + 5x - 3](/tpl/images/0298/8601/b80fb.png)
=![-5x^{2} + 9x - 9](/tpl/images/0298/8601/07172.png)
Ответ:
1/2
Step-by-step explanation:
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