16x^2-7x+9-31x=0

Simple and best practice solution for 16x^2-7x+9-31x=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 16x^2-7x+9-31x=0 equation:


Simplifying
16x2 + -7x + 9 + -31x = 0

Reorder the terms:
9 + -7x + -31x + 16x2 = 0

Combine like terms: -7x + -31x = -38x
9 + -38x + 16x2 = 0

Solving
9 + -38x + 16x2 = 0

Solving for variable 'x'.

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

Divide each side by '16'.
0.5625 + -2.375x + x2 = 0

Move the constant term to the right:

Add '-0.5625' to each side of the equation.
0.5625 + -2.375x + -0.5625 + x2 = 0 + -0.5625

Reorder the terms:
0.5625 + -0.5625 + -2.375x + x2 = 0 + -0.5625

Combine like terms: 0.5625 + -0.5625 = 0.0000
0.0000 + -2.375x + x2 = 0 + -0.5625
-2.375x + x2 = 0 + -0.5625

Combine like terms: 0 + -0.5625 = -0.5625
-2.375x + x2 = -0.5625

The x term is -2.375x.  Take half its coefficient (-1.1875).
Square it (1.41015625) and add it to both sides.

Add '1.41015625' to each side of the equation.
-2.375x + 1.41015625 + x2 = -0.5625 + 1.41015625

Reorder the terms:
1.41015625 + -2.375x + x2 = -0.5625 + 1.41015625

Combine like terms: -0.5625 + 1.41015625 = 0.84765625
1.41015625 + -2.375x + x2 = 0.84765625

Factor a perfect square on the left side:
(x + -1.1875)(x + -1.1875) = 0.84765625

Calculate the square root of the right side: 0.920682491

Break this problem into two subproblems by setting 
(x + -1.1875) equal to 0.920682491 and -0.920682491.

Subproblem 1

x + -1.1875 = 0.920682491 Simplifying x + -1.1875 = 0.920682491 Reorder the terms: -1.1875 + x = 0.920682491 Solving -1.1875 + x = 0.920682491 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.1875' to each side of the equation. -1.1875 + 1.1875 + x = 0.920682491 + 1.1875 Combine like terms: -1.1875 + 1.1875 = 0.0000 0.0000 + x = 0.920682491 + 1.1875 x = 0.920682491 + 1.1875 Combine like terms: 0.920682491 + 1.1875 = 2.108182491 x = 2.108182491 Simplifying x = 2.108182491

Subproblem 2

x + -1.1875 = -0.920682491 Simplifying x + -1.1875 = -0.920682491 Reorder the terms: -1.1875 + x = -0.920682491 Solving -1.1875 + x = -0.920682491 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.1875' to each side of the equation. -1.1875 + 1.1875 + x = -0.920682491 + 1.1875 Combine like terms: -1.1875 + 1.1875 = 0.0000 0.0000 + x = -0.920682491 + 1.1875 x = -0.920682491 + 1.1875 Combine like terms: -0.920682491 + 1.1875 = 0.266817509 x = 0.266817509 Simplifying x = 0.266817509

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.108182491, 0.266817509}

See similar equations:

| 9x^2-8x+16+32x=0 | | 9x^2-8x+16=-32x | | -4140/x=-828 | | 14p-13=5p+5 | | -828+x=-165.6 | | -4140+x=-828 | | 9w-24=5w+16 | | 726/x=22 | | 5x(x-18)=0 | | -3/4(12*-8)=-18 | | 8x^3y^2-24x^2y^3+40x^2y^2= | | 5x-6x+9=0 | | 3x+8=-2-x | | 5x+26=x-6 | | 8a-24=3a+26 | | 904/x=452 | | y=4x-3x^2 | | 452+x=226 | | 3m-6=m+24 | | -8x+12x-5=0 | | 3x^10=192x^4 | | -5(2x-5)-1=-3(3x-10) | | -452+x=226 | | 904+x=452 | | 5x+12x=-8 | | -3=6x+15-4x | | 4-3/4(3a+4)=7 | | x-7/y-6 | | 2p=p+5 | | 4120/x=1030 | | -4x+3=7 | | 16q-16=10q+2 |

Equations solver categories