Add the 2 and 9 together:
2q+11
Answer: B' (5, -8)
Step-by-step explanation:
Rotating 180 around the origin rule:
(x,y)--> (-x-y)
B (-5,8) B' (5, -8)
The x coordinate of the vertex will be the average of the two zeros, here -3 and 5, so x=(-3+5)/2 = 1, f(1)=(1+3)(1-5) = -16.
Answer: (1, -16)
Let's do it some other ways. How about completing the square to turn f in to vertex form?
f(x) = (x+3)(x-5) = x² - 2x - 15 = (x² - 2x + 1) - 1 - 15 = (x-1)² - 16
and now we can read off (1, -16) as the vertex.
The other method is the vertex is x= - b/2a = - (-2)/2(1) = 1.
Three methods, same answer. Good.
Answer:
x =9
Step-by-step explanation:
-5x = -45
Divide both sides by -5:
x = 9