(4x+1)(x-8)=8

Simple and best practice solution for (4x+1)(x-8)=8 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 (4x+1)(x-8)=8 equation:


Simplifying
(4x + 1)(x + -8) = 8

Reorder the terms:
(1 + 4x)(x + -8) = 8

Reorder the terms:
(1 + 4x)(-8 + x) = 8

Multiply (1 + 4x) * (-8 + x)
(1(-8 + x) + 4x * (-8 + x)) = 8
((-8 * 1 + x * 1) + 4x * (-8 + x)) = 8
((-8 + 1x) + 4x * (-8 + x)) = 8
(-8 + 1x + (-8 * 4x + x * 4x)) = 8
(-8 + 1x + (-32x + 4x2)) = 8

Combine like terms: 1x + -32x = -31x
(-8 + -31x + 4x2) = 8

Solving
-8 + -31x + 4x2 = 8

Solving for variable 'x'.

Reorder the terms:
-8 + -8 + -31x + 4x2 = 8 + -8

Combine like terms: -8 + -8 = -16
-16 + -31x + 4x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-16 + -31x + 4x2 = 0

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

Divide each side by '4'.
-4 + -7.75x + x2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -7.75x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + -7.75x + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -7.75x + x2 = 0 + 4
-7.75x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
-7.75x + x2 = 4

The x term is -7.75x.  Take half its coefficient (-3.875).
Square it (15.015625) and add it to both sides.

Add '15.015625' to each side of the equation.
-7.75x + 15.015625 + x2 = 4 + 15.015625

Reorder the terms:
15.015625 + -7.75x + x2 = 4 + 15.015625

Combine like terms: 4 + 15.015625 = 19.015625
15.015625 + -7.75x + x2 = 19.015625

Factor a perfect square on the left side:
(x + -3.875)(x + -3.875) = 19.015625

Calculate the square root of the right side: 4.360690886

Break this problem into two subproblems by setting 
(x + -3.875) equal to 4.360690886 and -4.360690886.

Subproblem 1

x + -3.875 = 4.360690886 Simplifying x + -3.875 = 4.360690886 Reorder the terms: -3.875 + x = 4.360690886 Solving -3.875 + x = 4.360690886 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.875' to each side of the equation. -3.875 + 3.875 + x = 4.360690886 + 3.875 Combine like terms: -3.875 + 3.875 = 0.000 0.000 + x = 4.360690886 + 3.875 x = 4.360690886 + 3.875 Combine like terms: 4.360690886 + 3.875 = 8.235690886 x = 8.235690886 Simplifying x = 8.235690886

Subproblem 2

x + -3.875 = -4.360690886 Simplifying x + -3.875 = -4.360690886 Reorder the terms: -3.875 + x = -4.360690886 Solving -3.875 + x = -4.360690886 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.875' to each side of the equation. -3.875 + 3.875 + x = -4.360690886 + 3.875 Combine like terms: -3.875 + 3.875 = 0.000 0.000 + x = -4.360690886 + 3.875 x = -4.360690886 + 3.875 Combine like terms: -4.360690886 + 3.875 = -0.485690886 x = -0.485690886 Simplifying x = -0.485690886

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.235690886, -0.485690886}

See similar equations:

| 17=f-9 | | J-9=-4 | | 21=-7e | | 7.50y+9= | | 0.08x(x-100)=65.5-0.07x | | W/12=-6 | | 5r-5=9+4r | | -3x+6+8x+20+10x-5x+23=0 | | -15+c=6 | | 3/7x=180 | | 5x-6x+27=18x-42+9x | | 1.5v=2-0.75 | | 48=1/2a2^2 | | 5x+26=5x+23 | | R/9-7=5 | | 2y^2-6y+18=0 | | 2808=1/2a12^2 | | -9/10-8=24 | | 2x+10+11=x+10 | | an=cde | | -4+5=7 | | n(n-1)(n-2)=990 | | 26=4x+b | | 57.95+60=117.9 | | 42=15x | | 3x=16-7y | | 6/3:4/3= | | F/12-15_-17 | | 57.95+60=50.45 | | N^3-2n^2-n^2+2n=990 | | Tanx=0.375 | | 2:4/3 |

Equations solver categories