10x(2x+4)-13=8(x+7)-3

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Solution for 10x(2x+4)-13=8(x+7)-3 equation:


Simplifying
10x(2x + 4) + -13 = 8(x + 7) + -3

Reorder the terms:
10x(4 + 2x) + -13 = 8(x + 7) + -3
(4 * 10x + 2x * 10x) + -13 = 8(x + 7) + -3
(40x + 20x2) + -13 = 8(x + 7) + -3

Reorder the terms:
-13 + 40x + 20x2 = 8(x + 7) + -3

Reorder the terms:
-13 + 40x + 20x2 = 8(7 + x) + -3
-13 + 40x + 20x2 = (7 * 8 + x * 8) + -3
-13 + 40x + 20x2 = (56 + 8x) + -3

Reorder the terms:
-13 + 40x + 20x2 = 56 + -3 + 8x

Combine like terms: 56 + -3 = 53
-13 + 40x + 20x2 = 53 + 8x

Solving
-13 + 40x + 20x2 = 53 + 8x

Solving for variable 'x'.

Reorder the terms:
-13 + -53 + 40x + -8x + 20x2 = 53 + 8x + -53 + -8x

Combine like terms: -13 + -53 = -66
-66 + 40x + -8x + 20x2 = 53 + 8x + -53 + -8x

Combine like terms: 40x + -8x = 32x
-66 + 32x + 20x2 = 53 + 8x + -53 + -8x

Reorder the terms:
-66 + 32x + 20x2 = 53 + -53 + 8x + -8x

Combine like terms: 53 + -53 = 0
-66 + 32x + 20x2 = 0 + 8x + -8x
-66 + 32x + 20x2 = 8x + -8x

Combine like terms: 8x + -8x = 0
-66 + 32x + 20x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-33 + 16x + 10x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-33 + 16x + 10x2)' equal to zero and attempt to solve: Simplifying -33 + 16x + 10x2 = 0 Solving -33 + 16x + 10x2 = 0 Begin completing the square. Divide all terms by 10 the coefficient of the squared term: Divide each side by '10'. -3.3 + 1.6x + x2 = 0.0 Move the constant term to the right: Add '3.3' to each side of the equation. -3.3 + 1.6x + 3.3 + x2 = 0.0 + 3.3 Reorder the terms: -3.3 + 3.3 + 1.6x + x2 = 0.0 + 3.3 Combine like terms: -3.3 + 3.3 = 0.0 0.0 + 1.6x + x2 = 0.0 + 3.3 1.6x + x2 = 0.0 + 3.3 Combine like terms: 0.0 + 3.3 = 3.3 1.6x + x2 = 3.3 The x term is 1.6x. Take half its coefficient (0.8). Square it (0.64) and add it to both sides. Add '0.64' to each side of the equation. 1.6x + 0.64 + x2 = 3.3 + 0.64 Reorder the terms: 0.64 + 1.6x + x2 = 3.3 + 0.64 Combine like terms: 3.3 + 0.64 = 3.94 0.64 + 1.6x + x2 = 3.94 Factor a perfect square on the left side: (x + 0.8)(x + 0.8) = 3.94 Calculate the square root of the right side: 1.984943324 Break this problem into two subproblems by setting (x + 0.8) equal to 1.984943324 and -1.984943324.

Subproblem 1

x + 0.8 = 1.984943324 Simplifying x + 0.8 = 1.984943324 Reorder the terms: 0.8 + x = 1.984943324 Solving 0.8 + x = 1.984943324 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + x = 1.984943324 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = 1.984943324 + -0.8 x = 1.984943324 + -0.8 Combine like terms: 1.984943324 + -0.8 = 1.184943324 x = 1.184943324 Simplifying x = 1.184943324

Subproblem 2

x + 0.8 = -1.984943324 Simplifying x + 0.8 = -1.984943324 Reorder the terms: 0.8 + x = -1.984943324 Solving 0.8 + x = -1.984943324 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + x = -1.984943324 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = -1.984943324 + -0.8 x = -1.984943324 + -0.8 Combine like terms: -1.984943324 + -0.8 = -2.784943324 x = -2.784943324 Simplifying x = -2.784943324

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.184943324, -2.784943324}

Solution

x = {1.184943324, -2.784943324}

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