-x^2+2x+12.5=0

Simple and best practice solution for -x^2+2x+12.5=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+2x+12.5=0 equation:


Simplifying
-1x2 + 2x + 12.5 = 0

Reorder the terms:
12.5 + 2x + -1x2 = 0

Solving
12.5 + 2x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-12.5 + -2x + x2 = 0

Move the constant term to the right:

Add '12.5' to each side of the equation.
-12.5 + -2x + 12.5 + x2 = 0 + 12.5

Reorder the terms:
-12.5 + 12.5 + -2x + x2 = 0 + 12.5

Combine like terms: -12.5 + 12.5 = 0.0
0.0 + -2x + x2 = 0 + 12.5
-2x + x2 = 0 + 12.5

Combine like terms: 0 + 12.5 = 12.5
-2x + x2 = 12.5

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 = 12.5 + 1

Reorder the terms:
1 + -2x + x2 = 12.5 + 1

Combine like terms: 12.5 + 1 = 13.5
1 + -2x + x2 = 13.5

Factor a perfect square on the left side:
(x + -1)(x + -1) = 13.5

Calculate the square root of the right side: 3.674234614

Break this problem into two subproblems by setting 
(x + -1) equal to 3.674234614 and -3.674234614.

Subproblem 1

x + -1 = 3.674234614 Simplifying x + -1 = 3.674234614 Reorder the terms: -1 + x = 3.674234614 Solving -1 + x = 3.674234614 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 = 3.674234614 + 1 Combine like terms: -1 + 1 = 0 0 + x = 3.674234614 + 1 x = 3.674234614 + 1 Combine like terms: 3.674234614 + 1 = 4.674234614 x = 4.674234614 Simplifying x = 4.674234614

Subproblem 2

x + -1 = -3.674234614 Simplifying x + -1 = -3.674234614 Reorder the terms: -1 + x = -3.674234614 Solving -1 + x = -3.674234614 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 = -3.674234614 + 1 Combine like terms: -1 + 1 = 0 0 + x = -3.674234614 + 1 x = -3.674234614 + 1 Combine like terms: -3.674234614 + 1 = -2.674234614 x = -2.674234614 Simplifying x = -2.674234614

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.674234614, -2.674234614}

See similar equations:

| -2=-(8-n) | | 4g+2(-4+4g)=1-g | | 6(3-x)+14=14 | | 11x+15x-7+4=-4x+4-7 | | 3s+6=-5(s-2) | | .3x^2-1.8x-8.1=0 | | 0=0.5x^2-x+40 | | -3(2m-9)-6(-4-m)= | | -5-2=3-6x | | 12(k-3)+(k+5)=48 | | 8+3y+2= | | -4(2.5+8.7)=(1.4-9.2x)(6) | | 5-(4+3)=-1+2+-3 | | e-66=-11 | | 5c^4d^2*c^2d^3= | | 32-7=5x | | 9(3-2p)=2(10-8p) | | 2.5p(2+5)=5p+12.5 | | 4n-2-9n+5= | | -4(1z-3)=-z | | 6c+3(2c-8)=12 | | -2+9=12x-4-11x | | -1-3(x-2)=-3x+13 | | 16p-24p= | | 8+19r-5=9r+31-4r | | 40=50-8x | | 6+0.10x=0.15x-8 | | (2/9)*(2/9)= | | 6+.5=.75 | | 1.5-5y=10 | | 40-8a=-4(a-2) | | 60=70-4x |

Equations solver categories