What is the solution set of 2x 2 + x = 15?
Question
Updated 9/1/2014 11:22:58 AM
This conversation has been flagged as incorrect.
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Original conversation
User: Which of the following statements follows from (x - 3) 2 = 5?

User: If (x + 1)(x - 3) = 5, then which of the following statements is true?

User: What is the solution set of 2x 2 + x = 15?

Weegy: It seems there is something wrong with the question you put forward. Please can you check it again before i can give an answer?
latefisher|Points 3420|

User: Write the quadratic equation in general form and then choose the value of "b." (2x - 1)(x + 5) = 0

Weegy: The general form of a quadratic equation is: y = ax^2 + bx + c. So we must multiply ours out. Using FOIL. [ This means to multiply the FIRST terms, then the OUTSIDE terms, then the INSIDE terms and finally the LAST terms and it looks like: 0 = (2x-1)(x+5) so 0 = 2x^2 + 10x -1x -5 then 0 = 2x^2 + 9x -5 = 0 Then a = 2, b = 9 and c = -5. Hope This Helps!! ]
gdemra|Points 136|

User: Which of the following points is in the solution set of y < x 2 - x - 6?

User: y(y + 4) - y = 6 is a quadratic equation.

Weegy: False. y(y 4) - y = 6 is written as: y^5 -y - 6 = 0. A quadratic equation is a second-order polynomial equation in a single variable y and this is not a second order polynomial equation.
befeeter|Points 406|

User: The length of a rectangle is 3 more than twice the width. The area of the rectangle is 119 square inches. What are the dimensions of the rectangle? If x = the width of the rectangle, which of the following equations is used in the process of solving this problem?

Question
Updated 9/1/2014 11:22:58 AM
This conversation has been flagged as incorrect.
Rating
8
(x - 3) 2 = 5
2x - 6 = 5
2x = 5 + 6
2x = 11
x = 11 / 2
8
2x^2 + x = 15
2x^2 + x - 15 = 0
Factor the left side
(2x - 5)(x + 3) = 0
2x - 5 = 0 or x + 3 = 0
x = 5/2 or x = - 3

Questions asked by the same visitor
A circle has a diameter with endpoints of (-2, 8) and (6, 4). What is the center of the circle?
Weegy: Diameter=10.198 center=(2,6) User: Which of the following equations is of a parabola with a vertex at (1, 2)? Weegy: The vertex of a parabola is the point where the parabola crosses its axis. If the coefficient of the x2 term is positive, the vertex will be the lowest point on the graph, the point at the bottom of the U -shape. [ If the coefficient of the x2 term is negative, the vertex will be the highest point on the graph, the point at the top of the U -shape. The standard equation of a parabola is y = ax2 + bx + c. But the equation for a parabola can also be written in "vertex form": y = a(x ? h)2 + k ] User: What is the solution set of 6x 2 - 24 = 0? Weegy: 6x - 5 = -17 solution is x = -2. Click on the "Good" button. Thank you. User: What is the solution set of 6x 2 - 24 = 0? Weegy: 6x - 5 = -17 solution is x = -2. Click on the "Good" button. Thank you. User: Which of the following constants can be added to x 2 - x to form a perfect square trinomial? Weegy: The answer is 1/4. Here, I'll show you how to get that answer: Trial and Error Method: 1) 1/4, [ 1/2 and 1 are the possible answers in the choices but we know that 1/2 is not a perfect square so it's not possible for 1/2 to be the answer. 2) Now try 1/4 and 1 and add them to the equation to get: x2 - x + 1/4 x2 - x + 1 3)Use the perfect square formula if you can: x2 - x + 1/4 becomes (x-1/2)2? Yes! x2 - x + 1 becomes (x-1)2 ...No! that's wrong because (a-b)2 = a2-2ab +b2 Thus, 1/4 is the answer. Easy Formula Method: 1) In a perfect square trinomial, c = (b/2a)2. a=1 because it's the co-efficient of x2 b=1 because it's the coefficient of x c=? and it's the missing constant using the formula and the given, c = 1/4. That's it! :D Good Luck! ] User: Runners in a long distance race start out going 8 kilometers east and then head north for the remainder of the race. The finish line is 10 kilometers from the starting line. How far did the runners travel ... (More)
Question
Updated 6/27/2014 12:20:18 AM
6x^2 - 24 = 0
6(x^2 - 4) = 0
6(x + 2)(x - 2) = 0
x = -2 or x = 2
Confirmed by yumdrea [6/28/2014 3:19:22 PM]
The line of symmetry for the quadratic equation y = ax^2 - 8x - 3 is x = 2. That is to say: x = -b/2a = -(-8)/2a = 2, 4/a = 2, a = 4/2 = 2
Confirmed by yumdrea [6/28/2014 3:19:24 PM]
Find the distance between the points (3, 8) and (-1, 9).
Weegy: distance formula d^2= (x2-x1)^2 + (y2-y1)^2 d^2= (-1-3)^2 + (9-8)^2 d^2= (-4)^2 + (1)^2 d^2= 16+1 d^2= 17 d= 17 User: Write the quadratic equation in general form. What is the value of b 2 - 4ac? 1 = 2x 2 + 7x User: Write the quadratic equation in general form. What is the value of b^2 - 4ac? 1 = 2x^2 + 7x (More)
Question
Updated 5/25/2014 8:16:21 AM
The distance between the points (3, 8) and (-1, 9) is sqrt 17.
Confirmed by jeifunk [5/25/2014 8:43:10 AM]
1 = 2x^2 + 7x
2x^2 + 7x - 1 = 0 which is the general form.
a = 2, b = 7, c = -1
b^2 - 4ac = 7^2 - 4(2)(-1) = 49 + 8 = 57
Confirmed by jeifunk [5/25/2014 8:59:18 AM]
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