x^2+8x-64=3

Simple and best practice solution for x^2+8x-64=3 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 x^2+8x-64=3 equation:


Simplifying
x2 + 8x + -64 = 3

Reorder the terms:
-64 + 8x + x2 = 3

Solving
-64 + 8x + x2 = 3

Solving for variable 'x'.

Reorder the terms:
-64 + -3 + 8x + x2 = 3 + -3

Combine like terms: -64 + -3 = -67
-67 + 8x + x2 = 3 + -3

Combine like terms: 3 + -3 = 0
-67 + 8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '67' to each side of the equation.
-67 + 8x + 67 + x2 = 0 + 67

Reorder the terms:
-67 + 67 + 8x + x2 = 0 + 67

Combine like terms: -67 + 67 = 0
0 + 8x + x2 = 0 + 67
8x + x2 = 0 + 67

Combine like terms: 0 + 67 = 67
8x + x2 = 67

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 = 67 + 16

Reorder the terms:
16 + 8x + x2 = 67 + 16

Combine like terms: 67 + 16 = 83
16 + 8x + x2 = 83

Factor a perfect square on the left side:
(x + 4)(x + 4) = 83

Calculate the square root of the right side: 9.110433579

Break this problem into two subproblems by setting 
(x + 4) equal to 9.110433579 and -9.110433579.

Subproblem 1

x + 4 = 9.110433579 Simplifying x + 4 = 9.110433579 Reorder the terms: 4 + x = 9.110433579 Solving 4 + x = 9.110433579 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 = 9.110433579 + -4 Combine like terms: 4 + -4 = 0 0 + x = 9.110433579 + -4 x = 9.110433579 + -4 Combine like terms: 9.110433579 + -4 = 5.110433579 x = 5.110433579 Simplifying x = 5.110433579

Subproblem 2

x + 4 = -9.110433579 Simplifying x + 4 = -9.110433579 Reorder the terms: 4 + x = -9.110433579 Solving 4 + x = -9.110433579 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 = -9.110433579 + -4 Combine like terms: 4 + -4 = 0 0 + x = -9.110433579 + -4 x = -9.110433579 + -4 Combine like terms: -9.110433579 + -4 = -13.110433579 x = -13.110433579 Simplifying x = -13.110433579

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.110433579, -13.110433579}

See similar equations:

| 24m+32=-4 | | 6x+8y=66 | | Y=37-15.3 | | 10=2(1+8m)+8(1+8m) | | 6x+9=6(x+5)-21 | | f+561=879 | | -19=7x+1-3x | | 5/4w=8 | | 5244/6 | | 21a-21=0 | | 7x+2=3y+94 | | 24=8(8n-5) | | 7.27x+58.16=116.32 | | c-3+c+4=196 | | x+(x+2)+(x+4)=447 | | 4-30x+24x=9 | | -1.5x=-3 | | 3.6=h-12.7 | | 3x+6(x-7)=3(x-6) | | 2(1+1x)=-2 | | 49x^2-28x+3=0 | | b^4-14b^3+40b^2=0 | | 34-10x=1 | | 2z^2-14=0 | | -6(b+1)=-8(2b-3) | | 1/7x-12=8 | | -3m/4+5=30 | | -(1/2+7x/5)=-9/2+8x/5 | | 3x6-12/4 | | 15/6+33/5 | | 2/3y-1=-13 | | 2.12x+64=4.4944+8x |

Equations solver categories