Step-by-step explanation:
1. Choose arbitrary points A and B in the plane and draw segment AB.
2. Raise a perpendicular m to AB at A.
3. Raise a perpendicular n to AB at B.
4. Choose an arbitrary point C on line n.
5. Drop a perpendicular from point C to line m. Let D be the foot of this perpendicular.
6. Then quadrilateral ABCD is a rectangle.
Solution by completing the square.
-5x^2+20x-17
=-5(x^2-4x)-17
=(-5(x-2)^2+20) -17
=-5(x-2)^2+3
So a=-5, d=-2, e=+3
a+d+e=-5-2+3=-4
Answer: -1
Step-by-step explanation: 4 + (-3) = 1 1 + (-2) = -1
Answer:
(x - 5)(2 + y)
Step-by-step explanation:
2x − 10 + xy − 5y
= 2(x - 5) + y(x - 5)
=(x - 5)(2 + y)