Answer:
(x -3)(x + 6)
Step-by-step explanation:
x^2+ 3x – 18
As you know
- 18 = -3 * 6
3 = -3 + 6
So
= (x -3)(x + 6)
Answer: y=80/5x+80
At one point graph goes from (0,400) to (25,800). So the y intercept is 400 because that’s where the line was at x=0. 0 to 25 is 25. 400 to 800 is 400. So the equation would be y=400/25x+400. But you can divide all of it by 5 to get y=80/5x+80.
See below
Take 1/2 of the 'a' coefficient, square it and add it
a^2 -5a + (-2.5)^2 = -4 +(- 2.5^2)
(a - 2.5)^2 = 2.25