0=x^2+x^2-3x-36

Simple and best practice solution for 0=x^2+x^2-3x-36 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 0=x^2+x^2-3x-36 equation:


Simplifying
0 = x2 + x2 + -3x + -36

Reorder the terms:
0 = -36 + -3x + x2 + x2

Combine like terms: x2 + x2 = 2x2
0 = -36 + -3x + 2x2

Solving
0 = -36 + -3x + 2x2

Solving for variable 'x'.

Combine like terms: 0 + 36 = 36
36 + 3x + -2x2 = -36 + -3x + 2x2 + 36 + 3x + -2x2

Reorder the terms:
36 + 3x + -2x2 = -36 + 36 + -3x + 3x + 2x2 + -2x2

Combine like terms: -36 + 36 = 0
36 + 3x + -2x2 = 0 + -3x + 3x + 2x2 + -2x2
36 + 3x + -2x2 = -3x + 3x + 2x2 + -2x2

Combine like terms: -3x + 3x = 0
36 + 3x + -2x2 = 0 + 2x2 + -2x2
36 + 3x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
36 + 3x + -2x2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-18 + -1.5x + x2 = 0

Move the constant term to the right:

Add '18' to each side of the equation.
-18 + -1.5x + 18 + x2 = 0 + 18

Reorder the terms:
-18 + 18 + -1.5x + x2 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + -1.5x + x2 = 0 + 18
-1.5x + x2 = 0 + 18

Combine like terms: 0 + 18 = 18
-1.5x + x2 = 18

The x term is -1.5x.  Take half its coefficient (-0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
-1.5x + 0.5625 + x2 = 18 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = 18 + 0.5625

Combine like terms: 18 + 0.5625 = 18.5625
0.5625 + -1.5x + x2 = 18.5625

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = 18.5625

Calculate the square root of the right side: 4.308421985

Break this problem into two subproblems by setting 
(x + -0.75) equal to 4.308421985 and -4.308421985.

Subproblem 1

x + -0.75 = 4.308421985 Simplifying x + -0.75 = 4.308421985 Reorder the terms: -0.75 + x = 4.308421985 Solving -0.75 + x = 4.308421985 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = 4.308421985 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 4.308421985 + 0.75 x = 4.308421985 + 0.75 Combine like terms: 4.308421985 + 0.75 = 5.058421985 x = 5.058421985 Simplifying x = 5.058421985

Subproblem 2

x + -0.75 = -4.308421985 Simplifying x + -0.75 = -4.308421985 Reorder the terms: -0.75 + x = -4.308421985 Solving -0.75 + x = -4.308421985 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = -4.308421985 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -4.308421985 + 0.75 x = -4.308421985 + 0.75 Combine like terms: -4.308421985 + 0.75 = -3.558421985 x = -3.558421985 Simplifying x = -3.558421985

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.058421985, -3.558421985}

See similar equations:

| 0.75+100=0.25n-1 | | 10n=7n+9+2n | | (-8+x)(x+5)=0 | | 100=a^2-6a+9 | | |1-12|*(-8)/(-4)= | | 0=x^2+5x-315 | | 9x-12x+4=49 | | 10=a^2+6a+9 | | 8*150= | | (2y-1)(9-y)=0 | | 18-6y+6y=18 | | 24T+15=-2+-24 | | 0=x^2+3x-180 | | 15+4.50x=13+5.75x | | 15+4.50=13+5.75x | | F(10)=15/x | | -20=3(x-3)+8x | | 2x-3-8x=14 | | -.6x+.5=.75 | | 11/4a=76/4 | | -3-5(8-3)= | | 3x^2+22x-5=0 | | 3x-10=5x-30 | | 3log(2)9x=6 | | F(9)=15/x | | 7/2r=28 | | 6=2(x-1)-2 | | (8p^2+6b-1)(8b^2-8b+7)=0 | | 2y+8x-5=0 | | 7000*cosine^2/2 | | 75-(3xm)=27 | | y^2=4x*x |

Equations solver categories