4x(x+14)=-20

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Solution for 4x(x+14)=-20 equation:


Simplifying
4x(x + 14) = -20

Reorder the terms:
4x(14 + x) = -20
(14 * 4x + x * 4x) = -20
(56x + 4x2) = -20

Solving
56x + 4x2 = -20

Solving for variable 'x'.

Reorder the terms:
20 + 56x + 4x2 = -20 + 20

Combine like terms: -20 + 20 = 0
20 + 56x + 4x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(5 + 14x + x2) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(5 + 14x + x2)' equal to zero and attempt to solve: Simplifying 5 + 14x + x2 = 0 Solving 5 + 14x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-5' to each side of the equation. 5 + 14x + -5 + x2 = 0 + -5 Reorder the terms: 5 + -5 + 14x + x2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 14x + x2 = 0 + -5 14x + x2 = 0 + -5 Combine like terms: 0 + -5 = -5 14x + x2 = -5 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 = -5 + 49 Reorder the terms: 49 + 14x + x2 = -5 + 49 Combine like terms: -5 + 49 = 44 49 + 14x + x2 = 44 Factor a perfect square on the left side: (x + 7)(x + 7) = 44 Calculate the square root of the right side: 6.633249581 Break this problem into two subproblems by setting (x + 7) equal to 6.633249581 and -6.633249581.

Subproblem 1

x + 7 = 6.633249581 Simplifying x + 7 = 6.633249581 Reorder the terms: 7 + x = 6.633249581 Solving 7 + x = 6.633249581 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 = 6.633249581 + -7 Combine like terms: 7 + -7 = 0 0 + x = 6.633249581 + -7 x = 6.633249581 + -7 Combine like terms: 6.633249581 + -7 = -0.366750419 x = -0.366750419 Simplifying x = -0.366750419

Subproblem 2

x + 7 = -6.633249581 Simplifying x + 7 = -6.633249581 Reorder the terms: 7 + x = -6.633249581 Solving 7 + x = -6.633249581 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 = -6.633249581 + -7 Combine like terms: 7 + -7 = 0 0 + x = -6.633249581 + -7 x = -6.633249581 + -7 Combine like terms: -6.633249581 + -7 = -13.633249581 x = -13.633249581 Simplifying x = -13.633249581

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.366750419, -13.633249581}

Solution

x = {-0.366750419, -13.633249581}

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