![Mathematics](/tpl/images/cats/mat.png)
Mathematics, 27.11.2020 01:10, bree2837
A) Show that x² - 8x + 20 can be written in the form (x - a)² + a where a is an integer.
b) Hence explain how you know that x² - 8x + 20 is always positive.
I have worked out the first bit of the question and the answer is:
x²-8x+20
x²-8x+16-16+20
(x-4)²+4
(x-a)²+a
a= 4
I just need help with part b and I'm struggling to do it. Please help.
![answer](/tpl/images/cats/otvet.png)
Answers: 1
Other questions on the subject: Mathematics
![image](/tpl/images/cats/mat.png)
![image](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 18:00, bvaughn6477
Clara schumann is buying bagels for her coworkers, she buys a dozen bagels priced at $5.49 a dozen. the bakery's cost for making the bagels is $2.25 per dozen. what is the markup rate based on selling price on a dozen bagels?
Answers: 1
![image](/tpl/images/cats/mat.png)
![image](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 22:00, stalley1521
How many solutions does the nonlinear system of equations graphed below have? a. one b. zero c. four d. two
Answers: 2
Do you know the correct answer?
A) Show that x² - 8x + 20 can be written in the form (x - a)² + a where a is an integer.
b) Hence e...
Questions in other subjects:
![Konu](/tpl/images/cats/ekonomika.png)
![Konu](/tpl/images/cats/biologiya.png)
Biology, 20.09.2020 17:01
![Konu](/tpl/images/cats/en.png)
![Konu](/tpl/images/cats/health.png)
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/en.png)
![Konu](/tpl/images/cats/biologiya.png)
Biology, 20.09.2020 17:01
![Konu](/tpl/images/cats/mir.png)
World Languages, 20.09.2020 17:01
![Konu](/tpl/images/cats/mat.png)