x^2-3x-124=0

Simple and best practice solution for x^2-3x-124=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-124=0 equation:


Simplifying
x2 + -3x + -124 = 0

Reorder the terms:
-124 + -3x + x2 = 0

Solving
-124 + -3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '124' to each side of the equation.
-124 + -3x + 124 + x2 = 0 + 124

Reorder the terms:
-124 + 124 + -3x + x2 = 0 + 124

Combine like terms: -124 + 124 = 0
0 + -3x + x2 = 0 + 124
-3x + x2 = 0 + 124

Combine like terms: 0 + 124 = 124
-3x + x2 = 124

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 = 124 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 124 + 2.25

Combine like terms: 124 + 2.25 = 126.25
2.25 + -3x + x2 = 126.25

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 126.25

Calculate the square root of the right side: 11.236102527

Break this problem into two subproblems by setting 
(x + -1.5) equal to 11.236102527 and -11.236102527.

Subproblem 1

x + -1.5 = 11.236102527 Simplifying x + -1.5 = 11.236102527 Reorder the terms: -1.5 + x = 11.236102527 Solving -1.5 + x = 11.236102527 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 = 11.236102527 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 11.236102527 + 1.5 x = 11.236102527 + 1.5 Combine like terms: 11.236102527 + 1.5 = 12.736102527 x = 12.736102527 Simplifying x = 12.736102527

Subproblem 2

x + -1.5 = -11.236102527 Simplifying x + -1.5 = -11.236102527 Reorder the terms: -1.5 + x = -11.236102527 Solving -1.5 + x = -11.236102527 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 = -11.236102527 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -11.236102527 + 1.5 x = -11.236102527 + 1.5 Combine like terms: -11.236102527 + 1.5 = -9.736102527 x = -9.736102527 Simplifying x = -9.736102527

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.736102527, -9.736102527}

See similar equations:

| 10-0.1x=100x | | 123-45-67+89= | | (15+5i)+(-10-9i)= | | -2-7k=3+14k | | 2x-50=10 | | 6(5s+7)=8(5s-1) | | log(x-1)+log(x-1)=0 | | 0,1(x+1)-0,05(3x-10)=0,9-0,35x | | 50x-4=1000 | | -12=4k+12 | | -17x-11=-113 | | (8+y)(5y-9)=0 | | 10g+2=72 | | (8+5i)+(4-3i)= | | 2(x+6)+2x+5=23 | | 5r+6= | | 12a+2=26 | | -17x-11=113 | | 1.0,3x+0,6=2,6+0,6x-0,6 | | 5(x+3)-2=16-3x-3+8x | | x-y+y=36+y | | y^2+9y-10=0 | | Sin(73)=x | | 4x+6y=180solvey | | 0.013=w(1-0.59w) | | 16x=-8+10x | | 3x^2-3y^2-51=0 | | 3.4x-8.5=22.1 | | 78=13x+2(x-6) | | -(-2+1.1z)=9-7.1z | | 2(14-n)=5n-7 | | 53+x=3x |

Equations solver categories