8x+1=x^2+4

Simple and best practice solution for 8x+1=x^2+4 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+1=x^2+4 equation:


Simplifying
8x + 1 = x2 + 4

Reorder the terms:
1 + 8x = x2 + 4

Reorder the terms:
1 + 8x = 4 + x2

Solving
1 + 8x = 4 + x2

Solving for variable 'x'.

Reorder the terms:
1 + -4 + 8x + -1x2 = 4 + x2 + -4 + -1x2

Combine like terms: 1 + -4 = -3
-3 + 8x + -1x2 = 4 + x2 + -4 + -1x2

Reorder the terms:
-3 + 8x + -1x2 = 4 + -4 + x2 + -1x2

Combine like terms: 4 + -4 = 0
-3 + 8x + -1x2 = 0 + x2 + -1x2
-3 + 8x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-3 + 8x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
3 + -8x + x2 = 0

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + -8x + -3 + x2 = 0 + -3

Reorder the terms:
3 + -3 + -8x + x2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -8x + x2 = 0 + -3
-8x + x2 = 0 + -3

Combine like terms: 0 + -3 = -3
-8x + x2 = -3

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = -3 + 16

Reorder the terms:
16 + -8x + x2 = -3 + 16

Combine like terms: -3 + 16 = 13
16 + -8x + x2 = 13

Factor a perfect square on the left side:
(x + -4)(x + -4) = 13

Calculate the square root of the right side: 3.605551275

Break this problem into two subproblems by setting 
(x + -4) equal to 3.605551275 and -3.605551275.

Subproblem 1

x + -4 = 3.605551275 Simplifying x + -4 = 3.605551275 Reorder the terms: -4 + x = 3.605551275 Solving -4 + x = 3.605551275 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 3.605551275 + 4 Combine like terms: -4 + 4 = 0 0 + x = 3.605551275 + 4 x = 3.605551275 + 4 Combine like terms: 3.605551275 + 4 = 7.605551275 x = 7.605551275 Simplifying x = 7.605551275

Subproblem 2

x + -4 = -3.605551275 Simplifying x + -4 = -3.605551275 Reorder the terms: -4 + x = -3.605551275 Solving -4 + x = -3.605551275 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -3.605551275 + 4 Combine like terms: -4 + 4 = 0 0 + x = -3.605551275 + 4 x = -3.605551275 + 4 Combine like terms: -3.605551275 + 4 = 0.394448725 x = 0.394448725 Simplifying x = 0.394448725

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.605551275, 0.394448725}

See similar equations:

| 10x+3y=24 | | 2x-3(x-5)=-x+3 | | 14x=2(3x+5) | | 7u*7u= | | 5x+49=7x-9 | | 10x-y=20 | | 6a+8.4=66.6 | | -5x+8=40 | | 2e*3= | | (x+8)(x)=40 | | 70x-10y=100 | | 6x-8y=-64 | | 2e+3= | | 6h=27 | | e(x)+4e(-x)=4.33 | | t^2+2t=35 | | 20z=6000 | | 10k=3000 | | y-4=-3(x-6) | | 15q=300 | | 5x+7y=49 | | 8k=864 | | 3(x+2)-x=12 | | 2h-(6h-5)=-3(h+1) | | 11z=121 | | x+7y=14 | | 19w=76 | | (x+10)(x)=100 | | 12p=0 | | 42x-7y=35 | | 9h=81 | | 73-4x=2x+7 |

Equations solver categories