-2x2 - 5x + 5 = 0
Updated 4/6/2014 8:07:02 AM
This conversation has been flagged as incorrect.
Flagged by yeswey [4/6/2014 8:03:15 AM]
Original conversation
User: -2x2 - 5x + 5 = 0

Weegy: If 5x - 3 < 7 then x<2.
emdroberts|Points 70|

User: Use the Quadratic Formula to solve the equation. -2x2 - 5x + 5 = 0

User: The function h = -t2 + 95 models the path of a ball thrown by a boy where h represents height, in feet, and t represents the time, in seconds, that the ball is in the air. Assuming the boy lives at sea level where h = 0 ft, which is a likely place the boy could have been standing when he threw this ball? A. his backyard B. an underground cave C. a ladder D. a bridge

Weegy: B. an underground cave. He is currently situated below sea level. Source:
eturker|Points 3067|

Updated 4/6/2014 8:07:02 AM
This conversation has been flagged as incorrect.
Flagged by yeswey [4/6/2014 8:03:15 AM]
Rating
3
-2x^2 - 5x + 5 = 0,
a = -2, b = -5, c = 5
b^2 - 4ac = (-5)^2 - 4(-2)(5) = 25 + 40 = 65
x = [-b +/- sqrt (b^2 - 4ac)]/2a = (5+/-sqrt 65)/-4
so x = (-5 - sqrt 65)/4 or x = (-5 + sqrt 65)/4
Confirmed by jeifunk [4/6/2014 8:17:03 AM]

Compare the equation, y = 9x - 4x2, the graph below, and the table below. Which has the steepest rate of change from x = 1 to x = 2, and what is its value?
Weegy: A.x= -1.1/9 User: Solve the equation. x2 + 18x + 81 = 25 Weegy: x2 + 18x + 81 = 25 x2 + 18x + 56 = 0 (x+14)(x+4) =0 x = -14 or -4 (B) User: What value completes the square for the expression? x2 - 18x (More)
Updated 4/6/2014 8:10:31 AM
The value that completes the square for the expression x^2 - 18x is 81.
x^2 - 18x + 81 = (x - 9)^2
Confirmed by andrewpallarca [4/6/2014 1:11:22 PM]
Find the solutions of the equation. 1/2x2 - x + 5 = 0 User: Solve by graphing. x2 +2x - 8 = 0
Updated 4/6/2014 8:12:08 AM
x^2 +2x - 8 = 0
(x + 4)(x - 2) = 0
x = -4 or 2
The solution for the equation x^2 +2x - 8 = 0 is x = -4 or 2.
Confirmed by jeifunk [4/6/2014 8:16:54 AM]
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