x^2+5x-240=0

Simple and best practice solution for x^2+5x-240=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+5x-240=0 equation:


Simplifying
x2 + 5x + -240 = 0

Reorder the terms:
-240 + 5x + x2 = 0

Solving
-240 + 5x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '240' to each side of the equation.
-240 + 5x + 240 + x2 = 0 + 240

Reorder the terms:
-240 + 240 + 5x + x2 = 0 + 240

Combine like terms: -240 + 240 = 0
0 + 5x + x2 = 0 + 240
5x + x2 = 0 + 240

Combine like terms: 0 + 240 = 240
5x + x2 = 240

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = 240 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 240 + 6.25

Combine like terms: 240 + 6.25 = 246.25
6.25 + 5x + x2 = 246.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 246.25

Calculate the square root of the right side: 15.692354826

Break this problem into two subproblems by setting 
(x + 2.5) equal to 15.692354826 and -15.692354826.

Subproblem 1

x + 2.5 = 15.692354826 Simplifying x + 2.5 = 15.692354826 Reorder the terms: 2.5 + x = 15.692354826 Solving 2.5 + x = 15.692354826 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 15.692354826 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 15.692354826 + -2.5 x = 15.692354826 + -2.5 Combine like terms: 15.692354826 + -2.5 = 13.192354826 x = 13.192354826 Simplifying x = 13.192354826

Subproblem 2

x + 2.5 = -15.692354826 Simplifying x + 2.5 = -15.692354826 Reorder the terms: 2.5 + x = -15.692354826 Solving 2.5 + x = -15.692354826 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -15.692354826 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -15.692354826 + -2.5 x = -15.692354826 + -2.5 Combine like terms: -15.692354826 + -2.5 = -18.192354826 x = -18.192354826 Simplifying x = -18.192354826

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.192354826, -18.192354826}

See similar equations:

| -8(4a+2)= | | 2y+2(43+-2y)=60 | | 4z-4i=3z^4+2i^4 | | y^3-7y^2+18y=0 | | 4/9x=36 | | Ln(x+2)=ln(8-2x) | | X/5-2 | | f(x)=3tan(2x) | | ((30000*12)/(x*8))=(9/4) | | X/3-2 | | 13-1/5 | | 13p-12=9p+12 | | 12x^2+48x+12=0 | | x+(x-20)+(x+20)=120 | | (-x^2)+4x+1=0 | | (2)/(3x)=(x)/(6) | | 6+78x=39x+18 | | -2x+3x=-6+17x | | 17-6x=9-7x | | 2x-18=4x+10 | | -4x+1=2x-8 | | 4p-6=-10 | | 3/8x-1/2x=1/4 | | 2x^4-14x^2-7=9 | | Y+4y=0 | | Squarey+4y=0 | | 94-4x=23x+16 | | 6y+4x=184 | | 6x=-21 | | 2y+8=-2 | | 3x^3-7x+6=0 | | 11-3x/7=6 |

Equations solver categories