3x(x+2)+7=10

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Solution for 3x(x+2)+7=10 equation:


Simplifying
3x(x + 2) + 7 = 10

Reorder the terms:
3x(2 + x) + 7 = 10
(2 * 3x + x * 3x) + 7 = 10
(6x + 3x2) + 7 = 10

Reorder the terms:
7 + 6x + 3x2 = 10

Solving
7 + 6x + 3x2 = 10

Solving for variable 'x'.

Reorder the terms:
7 + -10 + 6x + 3x2 = 10 + -10

Combine like terms: 7 + -10 = -3
-3 + 6x + 3x2 = 10 + -10

Combine like terms: 10 + -10 = 0
-3 + 6x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-1 + 2x + x2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-1 + 2x + x2)' equal to zero and attempt to solve: Simplifying -1 + 2x + x2 = 0 Solving -1 + 2x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '1' to each side of the equation. -1 + 2x + 1 + x2 = 0 + 1 Reorder the terms: -1 + 1 + 2x + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 2x + x2 = 0 + 1 2x + x2 = 0 + 1 Combine like terms: 0 + 1 = 1 2x + x2 = 1 The x term is 2x. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2x + 1 + x2 = 1 + 1 Reorder the terms: 1 + 2x + x2 = 1 + 1 Combine like terms: 1 + 1 = 2 1 + 2x + x2 = 2 Factor a perfect square on the left side: (x + 1)(x + 1) = 2 Calculate the square root of the right side: 1.414213562 Break this problem into two subproblems by setting (x + 1) equal to 1.414213562 and -1.414213562.

Subproblem 1

x + 1 = 1.414213562 Simplifying x + 1 = 1.414213562 Reorder the terms: 1 + x = 1.414213562 Solving 1 + x = 1.414213562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.414213562 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.414213562 + -1 x = 1.414213562 + -1 Combine like terms: 1.414213562 + -1 = 0.414213562 x = 0.414213562 Simplifying x = 0.414213562

Subproblem 2

x + 1 = -1.414213562 Simplifying x + 1 = -1.414213562 Reorder the terms: 1 + x = -1.414213562 Solving 1 + x = -1.414213562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.414213562 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.414213562 + -1 x = -1.414213562 + -1 Combine like terms: -1.414213562 + -1 = -2.414213562 x = -2.414213562 Simplifying x = -2.414213562

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.414213562, -2.414213562}

Solution

x = {0.414213562, -2.414213562}

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