10x(2-x)=7

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Solution for 10x(2-x)=7 equation:


Simplifying
10x(2 + -1x) = 7
(2 * 10x + -1x * 10x) = 7
(20x + -10x2) = 7

Solving
20x + -10x2 = 7

Solving for variable 'x'.

Reorder the terms:
-7 + 20x + -10x2 = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + 20x + -10x2 = 0

Begin completing the square.  Divide all terms by
-10 the coefficient of the squared term: 

Divide each side by '-10'.
0.7 + -2x + x2 = 0.0

Move the constant term to the right:

Add '-0.7' to each side of the equation.
0.7 + -2x + -0.7 + x2 = 0.0 + -0.7

Reorder the terms:
0.7 + -0.7 + -2x + x2 = 0.0 + -0.7

Combine like terms: 0.7 + -0.7 = 0.0
0.0 + -2x + x2 = 0.0 + -0.7
-2x + x2 = 0.0 + -0.7

Combine like terms: 0.0 + -0.7 = -0.7
-2x + x2 = -0.7

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = -0.7 + 1

Reorder the terms:
1 + -2x + x2 = -0.7 + 1

Combine like terms: -0.7 + 1 = 0.3
1 + -2x + x2 = 0.3

Factor a perfect square on the left side:
(x + -1)(x + -1) = 0.3

Calculate the square root of the right side: 0.547722558

Break this problem into two subproblems by setting 
(x + -1) equal to 0.547722558 and -0.547722558.

Subproblem 1

x + -1 = 0.547722558 Simplifying x + -1 = 0.547722558 Reorder the terms: -1 + x = 0.547722558 Solving -1 + x = 0.547722558 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 0.547722558 + 1 Combine like terms: -1 + 1 = 0 0 + x = 0.547722558 + 1 x = 0.547722558 + 1 Combine like terms: 0.547722558 + 1 = 1.547722558 x = 1.547722558 Simplifying x = 1.547722558

Subproblem 2

x + -1 = -0.547722558 Simplifying x + -1 = -0.547722558 Reorder the terms: -1 + x = -0.547722558 Solving -1 + x = -0.547722558 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -0.547722558 + 1 Combine like terms: -1 + 1 = 0 0 + x = -0.547722558 + 1 x = -0.547722558 + 1 Combine like terms: -0.547722558 + 1 = 0.452277442 x = 0.452277442 Simplifying x = 0.452277442

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.547722558, 0.452277442}

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