Since you need the vertex, and knowing the vertex will tell you the axis of symmetry, it is convenient to put the equation in vertex form.
.. -x^2 -4x +1
.. = -(x^2 +4x) +1
.. = -(x^2 +4x +(4/2)^2) +1 -(-(4/2)^2) . . . . complete the square
.. = -(x +2)^2 +5
The vertex is (-2, 5).
The axis of symmetry is x = -2.
Answer:
1
Step-by-step explanation:
(-5)+2+(3+1)
= -5+2+4
= -3+4
= 1
Answer:
0.5
Step-by-step explanation:
0.35 is 0.15 away from 0.5
0.35 is 0.35 away from 0
0.35 is 0.65 away from 1
Yes you have the correct answers for each of the four problems. Nice work.
For anyone curious,
rd = removable discontinuity
id = infinite discontinuity
c = continuous