x^2+3x-221=0

Simple and best practice solution for x^2+3x-221=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+3x-221=0 equation:


Simplifying
x2 + 3x + -221 = 0

Reorder the terms:
-221 + 3x + x2 = 0

Solving
-221 + 3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '221' to each side of the equation.
-221 + 3x + 221 + x2 = 0 + 221

Reorder the terms:
-221 + 221 + 3x + x2 = 0 + 221

Combine like terms: -221 + 221 = 0
0 + 3x + x2 = 0 + 221
3x + x2 = 0 + 221

Combine like terms: 0 + 221 = 221
3x + x2 = 221

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 221 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 221 + 2.25

Combine like terms: 221 + 2.25 = 223.25
2.25 + 3x + x2 = 223.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 223.25

Calculate the square root of the right side: 14.941552797

Break this problem into two subproblems by setting 
(x + 1.5) equal to 14.941552797 and -14.941552797.

Subproblem 1

x + 1.5 = 14.941552797 Simplifying x + 1.5 = 14.941552797 Reorder the terms: 1.5 + x = 14.941552797 Solving 1.5 + x = 14.941552797 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 14.941552797 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 14.941552797 + -1.5 x = 14.941552797 + -1.5 Combine like terms: 14.941552797 + -1.5 = 13.441552797 x = 13.441552797 Simplifying x = 13.441552797

Subproblem 2

x + 1.5 = -14.941552797 Simplifying x + 1.5 = -14.941552797 Reorder the terms: 1.5 + x = -14.941552797 Solving 1.5 + x = -14.941552797 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -14.941552797 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -14.941552797 + -1.5 x = -14.941552797 + -1.5 Combine like terms: -14.941552797 + -1.5 = -16.441552797 x = -16.441552797 Simplifying x = -16.441552797

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.441552797, -16.441552797}

See similar equations:

| y=19x-3 | | 3+4g=5+10g | | 4x+10y+11x+5y=180 | | 3(w+1)+1=11 | | 3(6x-12)-5x=6x+17 | | 3x=(0)-6 | | 3x^2-8x=-2-2x | | 0=140t-.5t^4+1500 | | 0.02x^2+0.6x+8= | | 4n-8=n+3 | | 8x-89-x=107 | | 15t-7t+t=36 | | p(t)=140t-.5t^4+1500 | | (.10)x+(.25)(13-x)=7 | | 3(0)=-y-6 | | -1+1g=5+7g | | 7(2t+1)-12=t-(t+4) | | 10x-4y=90 | | -3x-91+12x=98 | | s(x)=0.5x^2-8x+36 | | x^2+4x-119=0 | | 27+7x=6-8x | | 41250=(2080*x)+(520*1.5*x) | | x+x+2=2x+1 | | 32+8y=18x | | 20x+6y=90 | | 7x-8-5x=18 | | -7(x+2)-3x=20 | | 0.68+0.32t=3.22t-0.48 | | 8x-4((6x-2)-6(-5x-2))-(3x+8)=5((2x-4)+5) | | 501x-42y=6 | | -108+6x+7x=152 |

Equations solver categories