-2x(x-8)=4

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Solution for -2x(x-8)=4 equation:


Simplifying
-2x(x + -8) = 4

Reorder the terms:
-2x(-8 + x) = 4
(-8 * -2x + x * -2x) = 4
(16x + -2x2) = 4

Solving
16x + -2x2 = 4

Solving for variable 'x'.

Reorder the terms:
-4 + 16x + -2x2 = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + 16x + -2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-2 + 8x + -1x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-2 + 8x + -1x2)' equal to zero and attempt to solve: Simplifying -2 + 8x + -1x2 = 0 Solving -2 + 8x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 2 + -8x + x2 = 0 Move the constant term to the right: Add '-2' to each side of the equation. 2 + -8x + -2 + x2 = 0 + -2 Reorder the terms: 2 + -2 + -8x + x2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -8x + x2 = 0 + -2 -8x + x2 = 0 + -2 Combine like terms: 0 + -2 = -2 -8x + x2 = -2 The x term is -8x. Take half its coefficient (-4). Square it (16) and add it to both sides. Add '16' to each side of the equation. -8x + 16 + x2 = -2 + 16 Reorder the terms: 16 + -8x + x2 = -2 + 16 Combine like terms: -2 + 16 = 14 16 + -8x + x2 = 14 Factor a perfect square on the left side: (x + -4)(x + -4) = 14 Calculate the square root of the right side: 3.741657387 Break this problem into two subproblems by setting (x + -4) equal to 3.741657387 and -3.741657387.

Subproblem 1

x + -4 = 3.741657387 Simplifying x + -4 = 3.741657387 Reorder the terms: -4 + x = 3.741657387 Solving -4 + x = 3.741657387 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 3.741657387 + 4 Combine like terms: -4 + 4 = 0 0 + x = 3.741657387 + 4 x = 3.741657387 + 4 Combine like terms: 3.741657387 + 4 = 7.741657387 x = 7.741657387 Simplifying x = 7.741657387

Subproblem 2

x + -4 = -3.741657387 Simplifying x + -4 = -3.741657387 Reorder the terms: -4 + x = -3.741657387 Solving -4 + x = -3.741657387 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -3.741657387 + 4 Combine like terms: -4 + 4 = 0 0 + x = -3.741657387 + 4 x = -3.741657387 + 4 Combine like terms: -3.741657387 + 4 = 0.258342613 x = 0.258342613 Simplifying x = 0.258342613

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.741657387, 0.258342613}

Solution

x = {7.741657387, 0.258342613}

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