2x^2-x-0.75=0

Simple and best practice solution for 2x^2-x-0.75=0 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 2x^2-x-0.75=0 equation:


Simplifying
2x2 + -1x + -0.75 = 0

Reorder the terms:
-0.75 + -1x + 2x2 = 0

Solving
-0.75 + -1x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-0.375 + -0.5x + x2 = 0

Move the constant term to the right:

Add '0.375' to each side of the equation.
-0.375 + -0.5x + 0.375 + x2 = 0 + 0.375

Reorder the terms:
-0.375 + 0.375 + -0.5x + x2 = 0 + 0.375

Combine like terms: -0.375 + 0.375 = 0.000
0.000 + -0.5x + x2 = 0 + 0.375
-0.5x + x2 = 0 + 0.375

Combine like terms: 0 + 0.375 = 0.375
-0.5x + x2 = 0.375

The x term is -0.5x.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5x + 0.0625 + x2 = 0.375 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 0.375 + 0.0625

Combine like terms: 0.375 + 0.0625 = 0.4375
0.0625 + -0.5x + x2 = 0.4375

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 0.4375

Calculate the square root of the right side: 0.661437828

Break this problem into two subproblems by setting 
(x + -0.25) equal to 0.661437828 and -0.661437828.

Subproblem 1

x + -0.25 = 0.661437828 Simplifying x + -0.25 = 0.661437828 Reorder the terms: -0.25 + x = 0.661437828 Solving -0.25 + x = 0.661437828 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 0.661437828 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 0.661437828 + 0.25 x = 0.661437828 + 0.25 Combine like terms: 0.661437828 + 0.25 = 0.911437828 x = 0.911437828 Simplifying x = 0.911437828

Subproblem 2

x + -0.25 = -0.661437828 Simplifying x + -0.25 = -0.661437828 Reorder the terms: -0.25 + x = -0.661437828 Solving -0.25 + x = -0.661437828 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -0.661437828 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -0.661437828 + 0.25 x = -0.661437828 + 0.25 Combine like terms: -0.661437828 + 0.25 = -0.411437828 x = -0.411437828 Simplifying x = -0.411437828

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.911437828, -0.411437828}

See similar equations:

| 1/3•3.14•1000 | | 55=57-10e | | 5.1=m/.3 | | 2x-4(x-3)=-9+2x+5 | | 5c+9-7c= | | 4e^2x+3-1=11 | | 2-(x+15)=14 | | 7/12y | | 7x/3=3/4 | | 2(1-5k)=2k+38 | | 12-(2x+3)=10x-7 | | 24=2+4x | | X+2x-4=11 | | 14y/3x=8 | | Y=x^3-9x^2+24x-15 | | x+9=-1.6 | | 360=36n | | 14x-4+12x=16+x | | (2.81)(x)=15.93 | | 1/5(325-10*4) | | 5v(v-9)(v-8)=0 | | 6(3+k)=6(1+3k) | | (9y+2)(7y+9)=0 | | F(x)=(x+8)2 | | 28=3x-6x+1 | | x-10=0.0635 | | f(8)=9z+1 | | 1/5(300-10*5) | | 70x-9y= | | 11-2e=285 | | Y=-2(-3)+7 | | 5x-7x-20=60-8x |

Equations solver categories