-7x(10-x)=-58

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Solution for -7x(10-x)=-58 equation:


Simplifying
-7x(10 + -1x) = -58
(10 * -7x + -1x * -7x) = -58
(-70x + 7x2) = -58

Solving
-70x + 7x2 = -58

Solving for variable 'x'.

Reorder the terms:
58 + -70x + 7x2 = -58 + 58

Combine like terms: -58 + 58 = 0
58 + -70x + 7x2 = 0

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

Divide each side by '7'.
8.285714286 + -10x + x2 = 0

Move the constant term to the right:

Add '-8.285714286' to each side of the equation.
8.285714286 + -10x + -8.285714286 + x2 = 0 + -8.285714286

Reorder the terms:
8.285714286 + -8.285714286 + -10x + x2 = 0 + -8.285714286

Combine like terms: 8.285714286 + -8.285714286 = 0.000000000
0.000000000 + -10x + x2 = 0 + -8.285714286
-10x + x2 = 0 + -8.285714286

Combine like terms: 0 + -8.285714286 = -8.285714286
-10x + x2 = -8.285714286

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 = -8.285714286 + 25

Reorder the terms:
25 + -10x + x2 = -8.285714286 + 25

Combine like terms: -8.285714286 + 25 = 16.714285714
25 + -10x + x2 = 16.714285714

Factor a perfect square on the left side:
(x + -5)(x + -5) = 16.714285714

Calculate the square root of the right side: 4.088310863

Break this problem into two subproblems by setting 
(x + -5) equal to 4.088310863 and -4.088310863.

Subproblem 1

x + -5 = 4.088310863 Simplifying x + -5 = 4.088310863 Reorder the terms: -5 + x = 4.088310863 Solving -5 + x = 4.088310863 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 = 4.088310863 + 5 Combine like terms: -5 + 5 = 0 0 + x = 4.088310863 + 5 x = 4.088310863 + 5 Combine like terms: 4.088310863 + 5 = 9.088310863 x = 9.088310863 Simplifying x = 9.088310863

Subproblem 2

x + -5 = -4.088310863 Simplifying x + -5 = -4.088310863 Reorder the terms: -5 + x = -4.088310863 Solving -5 + x = -4.088310863 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 = -4.088310863 + 5 Combine like terms: -5 + 5 = 0 0 + x = -4.088310863 + 5 x = -4.088310863 + 5 Combine like terms: -4.088310863 + 5 = 0.911689137 x = 0.911689137 Simplifying x = 0.911689137

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.088310863, 0.911689137}

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