Question

Attach file I need help number 40,42 only,
thank

Answer 1

40)
\[x^2+6x+9+y^2=16\]
\[y=\pm \sqrt{-x^2-6x+7}\]

you should now be able to graph these two functions (for number 42):
\[y=\sqrt{-x^2-6x+7}\] and \[y=-\sqrt{-x^2-6x+7}\]

Answer 2

40) 6=3*2
and 3^2=9 ?

Answer 3

use wolfram graphing calculator and you will see a very interesting graph consistiing of real and complex roots.

Answer 4

www.wolframalpha.com/input/?i=y%3D-(-x^2-6x%2B7)^1%2F2

Answer 5

ty

Answer 6

yes, \[(x+3)^2=x^2+2*x*3+3^2=x^2+6x+9\]