x^2+x-320=0

Simple and best practice solution for x^2+x-320=0 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+x-320=0 equation:


Simplifying
x2 + x + -320 = 0

Reorder the terms:
-320 + x + x2 = 0

Solving
-320 + x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '320' to each side of the equation.
-320 + x + 320 + x2 = 0 + 320

Reorder the terms:
-320 + 320 + x + x2 = 0 + 320

Combine like terms: -320 + 320 = 0
0 + x + x2 = 0 + 320
x + x2 = 0 + 320

Combine like terms: 0 + 320 = 320
x + x2 = 320

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x + 0.25 + x2 = 320 + 0.25

Reorder the terms:
0.25 + x + x2 = 320 + 0.25

Combine like terms: 320 + 0.25 = 320.25
0.25 + x + x2 = 320.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 320.25

Calculate the square root of the right side: 17.895530168

Break this problem into two subproblems by setting 
(x + 0.5) equal to 17.895530168 and -17.895530168.

Subproblem 1

x + 0.5 = 17.895530168 Simplifying x + 0.5 = 17.895530168 Reorder the terms: 0.5 + x = 17.895530168 Solving 0.5 + x = 17.895530168 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 17.895530168 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 17.895530168 + -0.5 x = 17.895530168 + -0.5 Combine like terms: 17.895530168 + -0.5 = 17.395530168 x = 17.395530168 Simplifying x = 17.395530168

Subproblem 2

x + 0.5 = -17.895530168 Simplifying x + 0.5 = -17.895530168 Reorder the terms: 0.5 + x = -17.895530168 Solving 0.5 + x = -17.895530168 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -17.895530168 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -17.895530168 + -0.5 x = -17.895530168 + -0.5 Combine like terms: -17.895530168 + -0.5 = -18.395530168 x = -18.395530168 Simplifying x = -18.395530168

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.395530168, -18.395530168}

See similar equations:

| f-1-8=-3 | | 2y+6=5y-12 | | x-4x+44-5x+80=4x+20 | | 6x-2x=1-(-18) | | n+5=2n(-n) | | 6(u+2)+1=2(3u-5) | | 9x+9=18x+9 | | [1-5]+[-3]= | | 3*x^2+125*x-4000=0 | | (1-5)+(-3)= | | 2.3x(y)=56.626 | | (u-3)*8=32 | | 4n+4=39-3n | | (e+1)*3=6 | | 3+1=19 | | 5w+6=3w+12 | | .5c+6=11 | | .5+6=11 | | 4y-7+3(3y+3)=-2(y+4) | | 10x+10-20x+10x=10 | | (-12)x(-1)= | | 3xy^8=4y | | 2pq(p^2+3q)= | | 5b^2-5b-12=0 | | 3x+12-5x+20=1-3x-2 | | 2(x^2+3)=-7x | | 2x+-3x=3x-17 | | 5(x-7)-4(x-1)=8(x+3)-12 | | y=-(-1)+6 | | 11x+5=12x-5 | | 23x-12=-6x+51 | | 9x-8=9(x-4) |

Equations solver categories