2x^2+28x=98

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Solution for 2x^2+28x=98 equation:


Simplifying
2x2 + 28x = 98

Reorder the terms:
28x + 2x2 = 98

Solving
28x + 2x2 = 98

Solving for variable 'x'.

Reorder the terms:
-98 + 28x + 2x2 = 98 + -98

Combine like terms: 98 + -98 = 0
-98 + 28x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-49 + 14x + x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-49 + 14x + x2)' equal to zero and attempt to solve: Simplifying -49 + 14x + x2 = 0 Solving -49 + 14x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '49' to each side of the equation. -49 + 14x + 49 + x2 = 0 + 49 Reorder the terms: -49 + 49 + 14x + x2 = 0 + 49 Combine like terms: -49 + 49 = 0 0 + 14x + x2 = 0 + 49 14x + x2 = 0 + 49 Combine like terms: 0 + 49 = 49 14x + x2 = 49 The x term is 14x. Take half its coefficient (7). Square it (49) and add it to both sides. Add '49' to each side of the equation. 14x + 49 + x2 = 49 + 49 Reorder the terms: 49 + 14x + x2 = 49 + 49 Combine like terms: 49 + 49 = 98 49 + 14x + x2 = 98 Factor a perfect square on the left side: (x + 7)(x + 7) = 98 Calculate the square root of the right side: 9.899494937 Break this problem into two subproblems by setting (x + 7) equal to 9.899494937 and -9.899494937.

Subproblem 1

x + 7 = 9.899494937 Simplifying x + 7 = 9.899494937 Reorder the terms: 7 + x = 9.899494937 Solving 7 + x = 9.899494937 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = 9.899494937 + -7 Combine like terms: 7 + -7 = 0 0 + x = 9.899494937 + -7 x = 9.899494937 + -7 Combine like terms: 9.899494937 + -7 = 2.899494937 x = 2.899494937 Simplifying x = 2.899494937

Subproblem 2

x + 7 = -9.899494937 Simplifying x + 7 = -9.899494937 Reorder the terms: 7 + x = -9.899494937 Solving 7 + x = -9.899494937 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = -9.899494937 + -7 Combine like terms: 7 + -7 = 0 0 + x = -9.899494937 + -7 x = -9.899494937 + -7 Combine like terms: -9.899494937 + -7 = -16.899494937 x = -16.899494937 Simplifying x = -16.899494937

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.899494937, -16.899494937}

Solution

x = {2.899494937, -16.899494937}

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