4x^2+42x-170=0

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Solution for 4x^2+42x-170=0 equation:


Simplifying
4x2 + 42x + -170 = 0

Reorder the terms:
-170 + 42x + 4x2 = 0

Solving
-170 + 42x + 4x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-85 + 21x + 2x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-85 + 21x + 2x2)' equal to zero and attempt to solve: Simplifying -85 + 21x + 2x2 = 0 Solving -85 + 21x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -42.5 + 10.5x + x2 = 0 Move the constant term to the right: Add '42.5' to each side of the equation. -42.5 + 10.5x + 42.5 + x2 = 0 + 42.5 Reorder the terms: -42.5 + 42.5 + 10.5x + x2 = 0 + 42.5 Combine like terms: -42.5 + 42.5 = 0.0 0.0 + 10.5x + x2 = 0 + 42.5 10.5x + x2 = 0 + 42.5 Combine like terms: 0 + 42.5 = 42.5 10.5x + x2 = 42.5 The x term is 10.5x. Take half its coefficient (5.25). Square it (27.5625) and add it to both sides. Add '27.5625' to each side of the equation. 10.5x + 27.5625 + x2 = 42.5 + 27.5625 Reorder the terms: 27.5625 + 10.5x + x2 = 42.5 + 27.5625 Combine like terms: 42.5 + 27.5625 = 70.0625 27.5625 + 10.5x + x2 = 70.0625 Factor a perfect square on the left side: (x + 5.25)(x + 5.25) = 70.0625 Calculate the square root of the right side: 8.370334521 Break this problem into two subproblems by setting (x + 5.25) equal to 8.370334521 and -8.370334521.

Subproblem 1

x + 5.25 = 8.370334521 Simplifying x + 5.25 = 8.370334521 Reorder the terms: 5.25 + x = 8.370334521 Solving 5.25 + x = 8.370334521 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.25' to each side of the equation. 5.25 + -5.25 + x = 8.370334521 + -5.25 Combine like terms: 5.25 + -5.25 = 0.00 0.00 + x = 8.370334521 + -5.25 x = 8.370334521 + -5.25 Combine like terms: 8.370334521 + -5.25 = 3.120334521 x = 3.120334521 Simplifying x = 3.120334521

Subproblem 2

x + 5.25 = -8.370334521 Simplifying x + 5.25 = -8.370334521 Reorder the terms: 5.25 + x = -8.370334521 Solving 5.25 + x = -8.370334521 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.25' to each side of the equation. 5.25 + -5.25 + x = -8.370334521 + -5.25 Combine like terms: 5.25 + -5.25 = 0.00 0.00 + x = -8.370334521 + -5.25 x = -8.370334521 + -5.25 Combine like terms: -8.370334521 + -5.25 = -13.620334521 x = -13.620334521 Simplifying x = -13.620334521

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.120334521, -13.620334521}

Solution

x = {3.120334521, -13.620334521}

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