-x^2+6x=-30

Simple and best practice solution for -x^2+6x=-30 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+6x=-30 equation:


Simplifying
-1x2 + 6x = -30

Reorder the terms:
6x + -1x2 = -30

Solving
6x + -1x2 = -30

Solving for variable 'x'.

Reorder the terms:
30 + 6x + -1x2 = -30 + 30

Combine like terms: -30 + 30 = 0
30 + 6x + -1x2 = 0

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

Divide each side by '-1'.
-30 + -6x + x2 = 0

Move the constant term to the right:

Add '30' to each side of the equation.
-30 + -6x + 30 + x2 = 0 + 30

Reorder the terms:
-30 + 30 + -6x + x2 = 0 + 30

Combine like terms: -30 + 30 = 0
0 + -6x + x2 = 0 + 30
-6x + x2 = 0 + 30

Combine like terms: 0 + 30 = 30
-6x + x2 = 30

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = 30 + 9

Reorder the terms:
9 + -6x + x2 = 30 + 9

Combine like terms: 30 + 9 = 39
9 + -6x + x2 = 39

Factor a perfect square on the left side:
(x + -3)(x + -3) = 39

Calculate the square root of the right side: 6.244997998

Break this problem into two subproblems by setting 
(x + -3) equal to 6.244997998 and -6.244997998.

Subproblem 1

x + -3 = 6.244997998 Simplifying x + -3 = 6.244997998 Reorder the terms: -3 + x = 6.244997998 Solving -3 + x = 6.244997998 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 6.244997998 + 3 Combine like terms: -3 + 3 = 0 0 + x = 6.244997998 + 3 x = 6.244997998 + 3 Combine like terms: 6.244997998 + 3 = 9.244997998 x = 9.244997998 Simplifying x = 9.244997998

Subproblem 2

x + -3 = -6.244997998 Simplifying x + -3 = -6.244997998 Reorder the terms: -3 + x = -6.244997998 Solving -3 + x = -6.244997998 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -6.244997998 + 3 Combine like terms: -3 + 3 = 0 0 + x = -6.244997998 + 3 x = -6.244997998 + 3 Combine like terms: -6.244997998 + 3 = -3.244997998 x = -3.244997998 Simplifying x = -3.244997998

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.244997998, -3.244997998}

See similar equations:

| 16b^2-g^2= | | n(5n-8)=0 | | 2.5x^2-5x=10 | | 18=-3a | | -17v=-17 | | 12+d=21 | | 20=-4a | | 1/2-3x+5x=2 | | -22=-11u | | 25c^2+20cp+4p^2= | | 0=x^2-8x+17 | | 200w^2-160w+32= | | 30=-6u | | 40=-10s | | 4x-9=9x-34 | | 2a-36=16 | | t^2-15t+44=0 | | 30=10t | | b^2-16b+64= | | 15c-8c=20c-312 | | 2r^2=16r | | 0.3(x+20)+0.3x=15 | | 48=-12t | | 226-4x=32x+22 | | 0.57143y-8=0.28571y+10 | | 202-5x=2x+17 | | 9a-18+84=84 | | -99=-18+t | | b^2-8b-20=0 | | n+67=60 | | 5a+3-(3x-7)=a+9 | | 21=w-50 |

Equations solver categories