2x^2-20x+25=11

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Solution for 2x^2-20x+25=11 equation:


Simplifying
2x2 + -20x + 25 = 11

Reorder the terms:
25 + -20x + 2x2 = 11

Solving
25 + -20x + 2x2 = 11

Solving for variable 'x'.

Reorder the terms:
25 + -11 + -20x + 2x2 = 11 + -11

Combine like terms: 25 + -11 = 14
14 + -20x + 2x2 = 11 + -11

Combine like terms: 11 + -11 = 0
14 + -20x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(7 + -10x + x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(7 + -10x + x2)' equal to zero and attempt to solve: Simplifying 7 + -10x + x2 = 0 Solving 7 + -10x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-7' to each side of the equation. 7 + -10x + -7 + x2 = 0 + -7 Reorder the terms: 7 + -7 + -10x + x2 = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -10x + x2 = 0 + -7 -10x + x2 = 0 + -7 Combine like terms: 0 + -7 = -7 -10x + x2 = -7 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 = -7 + 25 Reorder the terms: 25 + -10x + x2 = -7 + 25 Combine like terms: -7 + 25 = 18 25 + -10x + x2 = 18 Factor a perfect square on the left side: (x + -5)(x + -5) = 18 Calculate the square root of the right side: 4.242640687 Break this problem into two subproblems by setting (x + -5) equal to 4.242640687 and -4.242640687.

Subproblem 1

x + -5 = 4.242640687 Simplifying x + -5 = 4.242640687 Reorder the terms: -5 + x = 4.242640687 Solving -5 + x = 4.242640687 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 = 4.242640687 + 5 Combine like terms: -5 + 5 = 0 0 + x = 4.242640687 + 5 x = 4.242640687 + 5 Combine like terms: 4.242640687 + 5 = 9.242640687 x = 9.242640687 Simplifying x = 9.242640687

Subproblem 2

x + -5 = -4.242640687 Simplifying x + -5 = -4.242640687 Reorder the terms: -5 + x = -4.242640687 Solving -5 + x = -4.242640687 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 = -4.242640687 + 5 Combine like terms: -5 + 5 = 0 0 + x = -4.242640687 + 5 x = -4.242640687 + 5 Combine like terms: -4.242640687 + 5 = 0.757359313 x = 0.757359313 Simplifying x = 0.757359313

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.242640687, 0.757359313}

Solution

x = {9.242640687, 0.757359313}

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