(0.7-x)(0.7-x)=0

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Solution for (0.7-x)(0.7-x)=0 equation:


Simplifying
(0.7 + -1x)(0.7 + -1x) = 0

Multiply (0.7 + -1x) * (0.7 + -1x)
(0.7(0.7 + -1x) + -1x * (0.7 + -1x)) = 0
((0.7 * 0.7 + -1x * 0.7) + -1x * (0.7 + -1x)) = 0
((0.49 + -0.7x) + -1x * (0.7 + -1x)) = 0
(0.49 + -0.7x + (0.7 * -1x + -1x * -1x)) = 0
(0.49 + -0.7x + (-0.7x + 1x2)) = 0

Combine like terms: -0.7x + -0.7x = -1.4x
(0.49 + -1.4x + 1x2) = 0

Solving
0.49 + -1.4x + 1x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-0.49' to each side of the equation.
0.49 + -1.4x + -0.49 + x2 = 0 + -0.49

Reorder the terms:
0.49 + -0.49 + -1.4x + x2 = 0 + -0.49

Combine like terms: 0.49 + -0.49 = 0.00
0.00 + -1.4x + x2 = 0 + -0.49
-1.4x + x2 = 0 + -0.49

Combine like terms: 0 + -0.49 = -0.49
-1.4x + x2 = -0.49

The x term is -1.4x.  Take half its coefficient (-0.7).
Square it (0.49) and add it to both sides.

Add '0.49' to each side of the equation.
-1.4x + 0.49 + x2 = -0.49 + 0.49

Reorder the terms:
0.49 + -1.4x + x2 = -0.49 + 0.49

Combine like terms: -0.49 + 0.49 = 0.00
0.49 + -1.4x + x2 = 0.00

Factor a perfect square on the left side:
(x + -0.7)(x + -0.7) = 0.00

Calculate the square root of the right side: 0.00

Break this problem into two subproblems by setting 
(x + -0.7) equal to 0.00 and 0.00.

Subproblem 1

x + -0.7 = 0.00 Simplifying x + -0.7 = 0.00 Reorder the terms: -0.7 + x = 0.00 Solving -0.7 + x = 0.00 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.7' to each side of the equation. -0.7 + 0.7 + x = 0.00 + 0.7 Combine like terms: -0.7 + 0.7 = 0.0 0.0 + x = 0.00 + 0.7 x = 0.00 + 0.7 Combine like terms: 0.00 + 0.7 = 0.7 x = 0.7 Simplifying x = 0.7

Subproblem 2

x + -0.7 = 0.00 Simplifying x + -0.7 = 0.00 Reorder the terms: -0.7 + x = 0.00 Solving -0.7 + x = 0.00 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.7' to each side of the equation. -0.7 + 0.7 + x = 0.00 + 0.7 Combine like terms: -0.7 + 0.7 = 0.0 0.0 + x = 0.00 + 0.7 x = 0.00 + 0.7 Combine like terms: 0.00 + 0.7 = 0.7 x = 0.7 Simplifying x = 0.7

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.7, 0.7}

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