x^2+7x-308=0

Simple and best practice solution for x^2+7x-308=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+7x-308=0 equation:


Simplifying
x2 + 7x + -308 = 0

Reorder the terms:
-308 + 7x + x2 = 0

Solving
-308 + 7x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '308' to each side of the equation.
-308 + 7x + 308 + x2 = 0 + 308

Reorder the terms:
-308 + 308 + 7x + x2 = 0 + 308

Combine like terms: -308 + 308 = 0
0 + 7x + x2 = 0 + 308
7x + x2 = 0 + 308

Combine like terms: 0 + 308 = 308
7x + x2 = 308

The x term is 7x.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7x + 12.25 + x2 = 308 + 12.25

Reorder the terms:
12.25 + 7x + x2 = 308 + 12.25

Combine like terms: 308 + 12.25 = 320.25
12.25 + 7x + x2 = 320.25

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = 320.25

Calculate the square root of the right side: 17.895530168

Break this problem into two subproblems by setting 
(x + 3.5) equal to 17.895530168 and -17.895530168.

Subproblem 1

x + 3.5 = 17.895530168 Simplifying x + 3.5 = 17.895530168 Reorder the terms: 3.5 + x = 17.895530168 Solving 3.5 + x = 17.895530168 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 17.895530168 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 17.895530168 + -3.5 x = 17.895530168 + -3.5 Combine like terms: 17.895530168 + -3.5 = 14.395530168 x = 14.395530168 Simplifying x = 14.395530168

Subproblem 2

x + 3.5 = -17.895530168 Simplifying x + 3.5 = -17.895530168 Reorder the terms: 3.5 + x = -17.895530168 Solving 3.5 + x = -17.895530168 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -17.895530168 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -17.895530168 + -3.5 x = -17.895530168 + -3.5 Combine like terms: -17.895530168 + -3.5 = -21.395530168 x = -21.395530168 Simplifying x = -21.395530168

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.395530168, -21.395530168}

See similar equations:

| 59=c+37 | | 120x^4=x^10 | | -10-3x=2x+23 | | 4x-26-3a=5a | | -x+5=5x-3 | | 5.4(-40)+1=5(-40-3) | | -9v-6=-8v-1 | | 3cos(x)=y | | 11x+7=23 | | 5a*3b=45 | | 4c-9=-1-4c | | P(-3)=2x^3+3x^2+2x-1 | | 7x^2+10x-16=20-9x | | S-12.5=14 | | X^2-1x-72=0 | | (18-2e)(2e+10)(-e+15)=0 | | X-5=5(x-5) | | (X-4)(x+4)(2x-3)=0 | | 2z+-10= | | 14=2+3c | | 4p(3p-1)(p+12)=0 | | 10x-8=6x+9 | | (8-16d)(8+16d)=0 | | 3x*3+5=305 | | 8u+21u= | | 187-(-23)(4)= | | -7(11)y= | | 2(x+5)+2x=26 | | d=n+8m | | 38=3k-1 | | -3d=-2d-7 | | (5r+3)(r+1)=0 |

Equations solver categories