-x^2+10x=-28

Simple and best practice solution for -x^2+10x=-28 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+10x=-28 equation:


Simplifying
-1x2 + 10x = -28

Reorder the terms:
10x + -1x2 = -28

Solving
10x + -1x2 = -28

Solving for variable 'x'.

Reorder the terms:
28 + 10x + -1x2 = -28 + 28

Combine like terms: -28 + 28 = 0
28 + 10x + -1x2 = 0

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

Divide each side by '-1'.
-28 + -10x + x2 = 0

Move the constant term to the right:

Add '28' to each side of the equation.
-28 + -10x + 28 + x2 = 0 + 28

Reorder the terms:
-28 + 28 + -10x + x2 = 0 + 28

Combine like terms: -28 + 28 = 0
0 + -10x + x2 = 0 + 28
-10x + x2 = 0 + 28

Combine like terms: 0 + 28 = 28
-10x + x2 = 28

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = 28 + 25

Reorder the terms:
25 + -10x + x2 = 28 + 25

Combine like terms: 28 + 25 = 53
25 + -10x + x2 = 53

Factor a perfect square on the left side:
(x + -5)(x + -5) = 53

Calculate the square root of the right side: 7.280109889

Break this problem into two subproblems by setting 
(x + -5) equal to 7.280109889 and -7.280109889.

Subproblem 1

x + -5 = 7.280109889 Simplifying x + -5 = 7.280109889 Reorder the terms: -5 + x = 7.280109889 Solving -5 + x = 7.280109889 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 7.280109889 + 5 Combine like terms: -5 + 5 = 0 0 + x = 7.280109889 + 5 x = 7.280109889 + 5 Combine like terms: 7.280109889 + 5 = 12.280109889 x = 12.280109889 Simplifying x = 12.280109889

Subproblem 2

x + -5 = -7.280109889 Simplifying x + -5 = -7.280109889 Reorder the terms: -5 + x = -7.280109889 Solving -5 + x = -7.280109889 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -7.280109889 + 5 Combine like terms: -5 + 5 = 0 0 + x = -7.280109889 + 5 x = -7.280109889 + 5 Combine like terms: -7.280109889 + 5 = -2.280109889 x = -2.280109889 Simplifying x = -2.280109889

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.280109889, -2.280109889}

See similar equations:

| 2(k-5)=-14+2k | | 122+12q=986 | | 161-13g=5 | | x^2-x+.25=20.25 | | 7f-116=290 | | n/16=-12 | | x=-1.5-1.5(0) | | (X+3)-(x+3)= | | 3lnx+7=5 | | x=-1.5-1.5y | | k/25-(-154)=168 | | -6(7n+1)=34-2n | | 5n+-100=n | | x^2-14n+40= | | p/(-24)+149=158 | | 3(x+3)=1+x | | 5xy-3x+4y=99 | | -25=c-968/(-1) | | 3ln(x)-7=5 | | 90*5.5= | | x^2+4x+2=365 | | 3x-4y=31 | | R/18=6 | | 31d+23=302 | | 12x^2=16x+3 | | V=(9y)(7y-2)(6y) | | 7.5+0.5x=15 | | 100-10*c=45 | | f/29+70=75 | | 110-10*c=45 | | 8x-54=40-8x | | 49=8j-7 |

Equations solver categories