0=2x^2-3x-4

Simple and best practice solution for 0=2x^2-3x-4 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 0=2x^2-3x-4 equation:


Simplifying
0 = 2x2 + -3x + -4

Reorder the terms:
0 = -4 + -3x + 2x2

Solving
0 = -4 + -3x + 2x2

Solving for variable 'x'.

Combine like terms: 0 + 4 = 4
4 + 3x + -2x2 = -4 + -3x + 2x2 + 4 + 3x + -2x2

Reorder the terms:
4 + 3x + -2x2 = -4 + 4 + -3x + 3x + 2x2 + -2x2

Combine like terms: -4 + 4 = 0
4 + 3x + -2x2 = 0 + -3x + 3x + 2x2 + -2x2
4 + 3x + -2x2 = -3x + 3x + 2x2 + -2x2

Combine like terms: -3x + 3x = 0
4 + 3x + -2x2 = 0 + 2x2 + -2x2
4 + 3x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
4 + 3x + -2x2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-2 + -1.5x + x2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -1.5x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + -1.5x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -1.5x + x2 = 0 + 2
-1.5x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
-1.5x + x2 = 2

The x term is -1.5x.  Take half its coefficient (-0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
-1.5x + 0.5625 + x2 = 2 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = 2 + 0.5625

Combine like terms: 2 + 0.5625 = 2.5625
0.5625 + -1.5x + x2 = 2.5625

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = 2.5625

Calculate the square root of the right side: 1.600781059

Break this problem into two subproblems by setting 
(x + -0.75) equal to 1.600781059 and -1.600781059.

Subproblem 1

x + -0.75 = 1.600781059 Simplifying x + -0.75 = 1.600781059 Reorder the terms: -0.75 + x = 1.600781059 Solving -0.75 + x = 1.600781059 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = 1.600781059 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 1.600781059 + 0.75 x = 1.600781059 + 0.75 Combine like terms: 1.600781059 + 0.75 = 2.350781059 x = 2.350781059 Simplifying x = 2.350781059

Subproblem 2

x + -0.75 = -1.600781059 Simplifying x + -0.75 = -1.600781059 Reorder the terms: -0.75 + x = -1.600781059 Solving -0.75 + x = -1.600781059 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = -1.600781059 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -1.600781059 + 0.75 x = -1.600781059 + 0.75 Combine like terms: -1.600781059 + 0.75 = -0.850781059 x = -0.850781059 Simplifying x = -0.850781059

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.350781059, -0.850781059}

See similar equations:

| -22g=-23 | | X^2=205 | | -22=-23 | | 5/3•4/3•-=8 | | x^2-21x= | | 3x(2x+3)=(5x+1)1 | | -4/3u-1/2 | | -k-6-7k-20=-2 | | 68=3x+14 | | 15z=-14 | | 2x^2+4=c^2 | | 14x-16=x^2 | | 6cot^2*x-18=0 | | 15z=-15 | | X^2-11=9 | | 8-(8x/3) | | 12(.25)-3= | | (2x-7.8)(9x-12.6)=0 | | 32.8n=8 | | 2x-3-5x=8+2x | | 86-86+3x-3x+2x=36 | | 16q=16 | | -2(4-6)=14 | | 14y+y-7y=16 | | 105=5x+15 | | 19c-15c=20 | | 7c+12c-27= | | 2(3-4x)=2(3x+2) | | 37=-16t^2+48t+5 | | x^2-d=(x+6)(x+c) | | -31m=-7 | | p-5.1=2.4 |

Equations solver categories