3x^2-12x=98

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Solution for 3x^2-12x=98 equation:


Simplifying
3x2 + -12x = 98

Reorder the terms:
-12x + 3x2 = 98

Solving
-12x + 3x2 = 98

Solving for variable 'x'.

Reorder the terms:
-98 + -12x + 3x2 = 98 + -98

Combine like terms: 98 + -98 = 0
-98 + -12x + 3x2 = 0

Begin completing the square.  Divide all terms by
3 the coefficient of the squared term: 

Divide each side by '3'.
-32.66666667 + -4x + x2 = 0

Move the constant term to the right:

Add '32.66666667' to each side of the equation.
-32.66666667 + -4x + 32.66666667 + x2 = 0 + 32.66666667

Reorder the terms:
-32.66666667 + 32.66666667 + -4x + x2 = 0 + 32.66666667

Combine like terms: -32.66666667 + 32.66666667 = 0.00000000
0.00000000 + -4x + x2 = 0 + 32.66666667
-4x + x2 = 0 + 32.66666667

Combine like terms: 0 + 32.66666667 = 32.66666667
-4x + x2 = 32.66666667

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = 32.66666667 + 4

Reorder the terms:
4 + -4x + x2 = 32.66666667 + 4

Combine like terms: 32.66666667 + 4 = 36.66666667
4 + -4x + x2 = 36.66666667

Factor a perfect square on the left side:
(x + -2)(x + -2) = 36.66666667

Calculate the square root of the right side: 6.055300708

Break this problem into two subproblems by setting 
(x + -2) equal to 6.055300708 and -6.055300708.

Subproblem 1

x + -2 = 6.055300708 Simplifying x + -2 = 6.055300708 Reorder the terms: -2 + x = 6.055300708 Solving -2 + x = 6.055300708 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 6.055300708 + 2 Combine like terms: -2 + 2 = 0 0 + x = 6.055300708 + 2 x = 6.055300708 + 2 Combine like terms: 6.055300708 + 2 = 8.055300708 x = 8.055300708 Simplifying x = 8.055300708

Subproblem 2

x + -2 = -6.055300708 Simplifying x + -2 = -6.055300708 Reorder the terms: -2 + x = -6.055300708 Solving -2 + x = -6.055300708 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -6.055300708 + 2 Combine like terms: -2 + 2 = 0 0 + x = -6.055300708 + 2 x = -6.055300708 + 2 Combine like terms: -6.055300708 + 2 = -4.055300708 x = -4.055300708 Simplifying x = -4.055300708

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.055300708, -4.055300708}

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