378=3x^2+6x

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Solution for 378=3x^2+6x equation:


Simplifying
378 = 3x2 + 6x

Reorder the terms:
378 = 6x + 3x2

Solving
378 = 6x + 3x2

Solving for variable 'x'.

Reorder the terms:
378 + -6x + -3x2 = 6x + -6x + 3x2 + -3x2

Combine like terms: 6x + -6x = 0
378 + -6x + -3x2 = 0 + 3x2 + -3x2
378 + -6x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
378 + -6x + -3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(126 + -2x + -1x2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(126 + -2x + -1x2)' equal to zero and attempt to solve: Simplifying 126 + -2x + -1x2 = 0 Solving 126 + -2x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. -126 + 2x + x2 = 0 Move the constant term to the right: Add '126' to each side of the equation. -126 + 2x + 126 + x2 = 0 + 126 Reorder the terms: -126 + 126 + 2x + x2 = 0 + 126 Combine like terms: -126 + 126 = 0 0 + 2x + x2 = 0 + 126 2x + x2 = 0 + 126 Combine like terms: 0 + 126 = 126 2x + x2 = 126 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 = 126 + 1 Reorder the terms: 1 + 2x + x2 = 126 + 1 Combine like terms: 126 + 1 = 127 1 + 2x + x2 = 127 Factor a perfect square on the left side: (x + 1)(x + 1) = 127 Calculate the square root of the right side: 11.26942767 Break this problem into two subproblems by setting (x + 1) equal to 11.26942767 and -11.26942767.

Subproblem 1

x + 1 = 11.26942767 Simplifying x + 1 = 11.26942767 Reorder the terms: 1 + x = 11.26942767 Solving 1 + x = 11.26942767 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 = 11.26942767 + -1 Combine like terms: 1 + -1 = 0 0 + x = 11.26942767 + -1 x = 11.26942767 + -1 Combine like terms: 11.26942767 + -1 = 10.26942767 x = 10.26942767 Simplifying x = 10.26942767

Subproblem 2

x + 1 = -11.26942767 Simplifying x + 1 = -11.26942767 Reorder the terms: 1 + x = -11.26942767 Solving 1 + x = -11.26942767 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 = -11.26942767 + -1 Combine like terms: 1 + -1 = 0 0 + x = -11.26942767 + -1 x = -11.26942767 + -1 Combine like terms: -11.26942767 + -1 = -12.26942767 x = -12.26942767 Simplifying x = -12.26942767

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.26942767, -12.26942767}

Solution

x = {10.26942767, -12.26942767}

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