x^2+2x=1600

Simple and best practice solution for x^2+2x=1600 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+2x=1600 equation:


Simplifying
x2 + 2x = 1600

Reorder the terms:
2x + x2 = 1600

Solving
2x + x2 = 1600

Solving for variable 'x'.

Reorder the terms:
-1600 + 2x + x2 = 1600 + -1600

Combine like terms: 1600 + -1600 = 0
-1600 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '1600' to each side of the equation.
-1600 + 2x + 1600 + x2 = 0 + 1600

Reorder the terms:
-1600 + 1600 + 2x + x2 = 0 + 1600

Combine like terms: -1600 + 1600 = 0
0 + 2x + x2 = 0 + 1600
2x + x2 = 0 + 1600

Combine like terms: 0 + 1600 = 1600
2x + x2 = 1600

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 1600 + 1

Reorder the terms:
1 + 2x + x2 = 1600 + 1

Combine like terms: 1600 + 1 = 1601
1 + 2x + x2 = 1601

Factor a perfect square on the left side:
(x + 1)(x + 1) = 1601

Calculate the square root of the right side: 40.012498047

Break this problem into two subproblems by setting 
(x + 1) equal to 40.012498047 and -40.012498047.

Subproblem 1

x + 1 = 40.012498047 Simplifying x + 1 = 40.012498047 Reorder the terms: 1 + x = 40.012498047 Solving 1 + x = 40.012498047 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 40.012498047 + -1 Combine like terms: 1 + -1 = 0 0 + x = 40.012498047 + -1 x = 40.012498047 + -1 Combine like terms: 40.012498047 + -1 = 39.012498047 x = 39.012498047 Simplifying x = 39.012498047

Subproblem 2

x + 1 = -40.012498047 Simplifying x + 1 = -40.012498047 Reorder the terms: 1 + x = -40.012498047 Solving 1 + x = -40.012498047 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -40.012498047 + -1 Combine like terms: 1 + -1 = 0 0 + x = -40.012498047 + -1 x = -40.012498047 + -1 Combine like terms: -40.012498047 + -1 = -41.012498047 x = -41.012498047 Simplifying x = -41.012498047

Solution

The solution to the problem is based on the solutions from the subproblems. x = {39.012498047, -41.012498047}

See similar equations:

| 15y+4(5-2y)= | | (3x^2)-(x-2)= | | 2x-7=3-8 | | 2x^3+x^2-4x+4=0 | | 8(3x-7)=2(12x+4) | | (3x-5)+(3x^2)= | | x(2x+1)(3x+9)=0 | | 2x-0,66(x-1)=2x-2(x+1) | | 8x-18=6(7x-3) | | 4x^2-8x+3x=0 | | 4x^2-8x+12x=0 | | 6+k=2 | | 9+2x-5=9x+4-6x | | 10x-3y=9 | | 1-3x=3-1-10 | | 5N-3+2N=1+5N | | 20-3x=2x+5 | | x^2+y^2-16y-13=0 | | 8x=42x | | x^2-9x-48=0 | | 6x-4x=46 | | 8x+48=120 | | 6+10x-12+4x=-8(2x-6)+36 | | 8x-9=2x+15 | | 18=2x+2x+x+x | | 22x+22(x-9)= | | 17=2x+5+x | | 3y+5x=180 | | 3x-9=30x+9-10x | | 4x=15-(1-14) | | d-3=-6 | | 7x-1=3x-3 |

Equations solver categories