2x^2+20x+100=98

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Solution for 2x^2+20x+100=98 equation:


Simplifying
2x2 + 20x + 100 = 98

Reorder the terms:
100 + 20x + 2x2 = 98

Solving
100 + 20x + 2x2 = 98

Solving for variable 'x'.

Reorder the terms:
100 + -98 + 20x + 2x2 = 98 + -98

Combine like terms: 100 + -98 = 2
2 + 20x + 2x2 = 98 + -98

Combine like terms: 98 + -98 = 0
2 + 20x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(1 + 10x + x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(1 + 10x + x2)' equal to zero and attempt to solve: Simplifying 1 + 10x + x2 = 0 Solving 1 + 10x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-1' to each side of the equation. 1 + 10x + -1 + x2 = 0 + -1 Reorder the terms: 1 + -1 + 10x + x2 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 10x + x2 = 0 + -1 10x + x2 = 0 + -1 Combine like terms: 0 + -1 = -1 10x + x2 = -1 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 = -1 + 25 Reorder the terms: 25 + 10x + x2 = -1 + 25 Combine like terms: -1 + 25 = 24 25 + 10x + x2 = 24 Factor a perfect square on the left side: (x + 5)(x + 5) = 24 Calculate the square root of the right side: 4.898979486 Break this problem into two subproblems by setting (x + 5) equal to 4.898979486 and -4.898979486.

Subproblem 1

x + 5 = 4.898979486 Simplifying x + 5 = 4.898979486 Reorder the terms: 5 + x = 4.898979486 Solving 5 + x = 4.898979486 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 = 4.898979486 + -5 Combine like terms: 5 + -5 = 0 0 + x = 4.898979486 + -5 x = 4.898979486 + -5 Combine like terms: 4.898979486 + -5 = -0.101020514 x = -0.101020514 Simplifying x = -0.101020514

Subproblem 2

x + 5 = -4.898979486 Simplifying x + 5 = -4.898979486 Reorder the terms: 5 + x = -4.898979486 Solving 5 + x = -4.898979486 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 = -4.898979486 + -5 Combine like terms: 5 + -5 = 0 0 + x = -4.898979486 + -5 x = -4.898979486 + -5 Combine like terms: -4.898979486 + -5 = -9.898979486 x = -9.898979486 Simplifying x = -9.898979486

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.101020514, -9.898979486}

Solution

x = {-0.101020514, -9.898979486}

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