-8x^2+11x+11=0

Simple and best practice solution for -8x^2+11x+11=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 -8x^2+11x+11=0 equation:


Simplifying
-8x2 + 11x + 11 = 0

Reorder the terms:
11 + 11x + -8x2 = 0

Solving
11 + 11x + -8x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-8 the coefficient of the squared term: 

Divide each side by '-8'.
-1.375 + -1.375x + x2 = 0

Move the constant term to the right:

Add '1.375' to each side of the equation.
-1.375 + -1.375x + 1.375 + x2 = 0 + 1.375

Reorder the terms:
-1.375 + 1.375 + -1.375x + x2 = 0 + 1.375

Combine like terms: -1.375 + 1.375 = 0.000
0.000 + -1.375x + x2 = 0 + 1.375
-1.375x + x2 = 0 + 1.375

Combine like terms: 0 + 1.375 = 1.375
-1.375x + x2 = 1.375

The x term is -1.375x.  Take half its coefficient (-0.6875).
Square it (0.47265625) and add it to both sides.

Add '0.47265625' to each side of the equation.
-1.375x + 0.47265625 + x2 = 1.375 + 0.47265625

Reorder the terms:
0.47265625 + -1.375x + x2 = 1.375 + 0.47265625

Combine like terms: 1.375 + 0.47265625 = 1.84765625
0.47265625 + -1.375x + x2 = 1.84765625

Factor a perfect square on the left side:
(x + -0.6875)(x + -0.6875) = 1.84765625

Calculate the square root of the right side: 1.359285198

Break this problem into two subproblems by setting 
(x + -0.6875) equal to 1.359285198 and -1.359285198.

Subproblem 1

x + -0.6875 = 1.359285198 Simplifying x + -0.6875 = 1.359285198 Reorder the terms: -0.6875 + x = 1.359285198 Solving -0.6875 + x = 1.359285198 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6875' to each side of the equation. -0.6875 + 0.6875 + x = 1.359285198 + 0.6875 Combine like terms: -0.6875 + 0.6875 = 0.0000 0.0000 + x = 1.359285198 + 0.6875 x = 1.359285198 + 0.6875 Combine like terms: 1.359285198 + 0.6875 = 2.046785198 x = 2.046785198 Simplifying x = 2.046785198

Subproblem 2

x + -0.6875 = -1.359285198 Simplifying x + -0.6875 = -1.359285198 Reorder the terms: -0.6875 + x = -1.359285198 Solving -0.6875 + x = -1.359285198 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6875' to each side of the equation. -0.6875 + 0.6875 + x = -1.359285198 + 0.6875 Combine like terms: -0.6875 + 0.6875 = 0.0000 0.0000 + x = -1.359285198 + 0.6875 x = -1.359285198 + 0.6875 Combine like terms: -1.359285198 + 0.6875 = -0.671785198 x = -0.671785198 Simplifying x = -0.671785198

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.046785198, -0.671785198}

See similar equations:

| x-1.3= | | 3x+0y=18 | | [4-2]-10=1 | | 2(-3x-2)+4-1=15 | | 59=-3S+4 | | (8x+9)+(4x-5)= | | 90+x+67=180 | | x+(x+1)=48+(x+2) | | x(5x-36)=26 | | -2(x-2)-3(x+1)=10 | | W-5.7=6.5 | | 0=x^2-1/4x-35/64 | | 4/5x-6/19x=3 | | 5/7=30/x | | 8=4/9y | | 6(4x-8)-2=6(x-2)+52 | | 2x+1=48x+50 | | U+2.25=6.43 | | (3y^5/6z^2)^-2= | | 6=4/9y | | 8x^2+12-8=0 | | 5(-3x+2)-2x-2=111 | | (3y^5/6z^2)^-2 | | 550=2.50x | | -26=-6+4y | | 8(4+3d)=152 | | Y-7.9=5.2 | | 4s-15s=55 | | -5(-2x-4)+5x-4=-29 | | 0=x^2+8x-64 | | 6=4/9y-2 | | -7+4v=13 |

Equations solver categories