9x-4x(-8)x=15

Simple and best practice solution for 9x-4x(-8)x=15 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 9x-4x(-8)x=15 equation:


Simplifying
9x + -4x(-8) * x = 15

Reorder the terms for easier multiplication:
9x + -4 * -8x * x = 15

Multiply -4 * -8
9x + 32x * x = 15

Multiply x * x
9x + 32x2 = 15

Solving
9x + 32x2 = 15

Solving for variable 'x'.

Reorder the terms:
-15 + 9x + 32x2 = 15 + -15

Combine like terms: 15 + -15 = 0
-15 + 9x + 32x2 = 0

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

Divide each side by '32'.
-0.46875 + 0.28125x + x2 = 0

Move the constant term to the right:

Add '0.46875' to each side of the equation.
-0.46875 + 0.28125x + 0.46875 + x2 = 0 + 0.46875

Reorder the terms:
-0.46875 + 0.46875 + 0.28125x + x2 = 0 + 0.46875

Combine like terms: -0.46875 + 0.46875 = 0.00000
0.00000 + 0.28125x + x2 = 0 + 0.46875
0.28125x + x2 = 0 + 0.46875

Combine like terms: 0 + 0.46875 = 0.46875
0.28125x + x2 = 0.46875

The x term is 0.28125x.  Take half its coefficient (0.140625).
Square it (0.01977539063) and add it to both sides.

Add '0.01977539063' to each side of the equation.
0.28125x + 0.01977539063 + x2 = 0.46875 + 0.01977539063

Reorder the terms:
0.01977539063 + 0.28125x + x2 = 0.46875 + 0.01977539063

Combine like terms: 0.46875 + 0.01977539063 = 0.48852539063
0.01977539063 + 0.28125x + x2 = 0.48852539063

Factor a perfect square on the left side:
(x + 0.140625)(x + 0.140625) = 0.48852539063

Calculate the square root of the right side: 0.698945914

Break this problem into two subproblems by setting 
(x + 0.140625) equal to 0.698945914 and -0.698945914.

Subproblem 1

x + 0.140625 = 0.698945914 Simplifying x + 0.140625 = 0.698945914 Reorder the terms: 0.140625 + x = 0.698945914 Solving 0.140625 + x = 0.698945914 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.140625' to each side of the equation. 0.140625 + -0.140625 + x = 0.698945914 + -0.140625 Combine like terms: 0.140625 + -0.140625 = 0.000000 0.000000 + x = 0.698945914 + -0.140625 x = 0.698945914 + -0.140625 Combine like terms: 0.698945914 + -0.140625 = 0.558320914 x = 0.558320914 Simplifying x = 0.558320914

Subproblem 2

x + 0.140625 = -0.698945914 Simplifying x + 0.140625 = -0.698945914 Reorder the terms: 0.140625 + x = -0.698945914 Solving 0.140625 + x = -0.698945914 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.140625' to each side of the equation. 0.140625 + -0.140625 + x = -0.698945914 + -0.140625 Combine like terms: 0.140625 + -0.140625 = 0.000000 0.000000 + x = -0.698945914 + -0.140625 x = -0.698945914 + -0.140625 Combine like terms: -0.698945914 + -0.140625 = -0.839570914 x = -0.839570914 Simplifying x = -0.839570914

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.558320914, -0.839570914}

See similar equations:

| -6.8(4s+6)-2.2(2s-5)= | | 10+11x=110-x | | 5k-k+3k-4=0 | | 1(-4x+2y)=1(-17) | | 5-m/3m-15 | | 2x-2.7=5.8 | | (5)5x+5=(625)x | | 2x-2=63-11x | | 4r-8r+8r+r= | | 3(x-20)=6x | | x/8+1/2=-1/2 | | x+28=4x-2 | | s^2-64= | | n^2-3n+2= | | 2k^2+46= | | 4/5-2 | | 3(x-20)=6 | | 4/5-2 | | n^2-3n-12=0 | | 3x+19=6x-2 | | (5u+u)(2u+1)=0 | | n^2-3n-12= | | x+13=4x-17 | | 3x-4+6x+2-2x=4x | | (5w^2-80)/(w^2-2w-8) | | (3x-2)= | | 3x+57x+654x=4x+78x | | 4x-17=x+3 | | 3/11(-33)+12(11) | | y=-7/8(-8)+2 | | 11x+6=5x+54 | | F=9/4(n-27) |

Equations solver categories