3x^2-7x=153

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Solution for 3x^2-7x=153 equation:


Simplifying
3x2 + -7x = 153

Reorder the terms:
-7x + 3x2 = 153

Solving
-7x + 3x2 = 153

Solving for variable 'x'.

Reorder the terms:
-153 + -7x + 3x2 = 153 + -153

Combine like terms: 153 + -153 = 0
-153 + -7x + 3x2 = 0

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

Divide each side by '3'.
-51 + -2.333333333x + x2 = 0

Move the constant term to the right:

Add '51' to each side of the equation.
-51 + -2.333333333x + 51 + x2 = 0 + 51

Reorder the terms:
-51 + 51 + -2.333333333x + x2 = 0 + 51

Combine like terms: -51 + 51 = 0
0 + -2.333333333x + x2 = 0 + 51
-2.333333333x + x2 = 0 + 51

Combine like terms: 0 + 51 = 51
-2.333333333x + x2 = 51

The x term is -2.333333333x.  Take half its coefficient (-1.166666667).
Square it (1.361111112) and add it to both sides.

Add '1.361111112' to each side of the equation.
-2.333333333x + 1.361111112 + x2 = 51 + 1.361111112

Reorder the terms:
1.361111112 + -2.333333333x + x2 = 51 + 1.361111112

Combine like terms: 51 + 1.361111112 = 52.361111112
1.361111112 + -2.333333333x + x2 = 52.361111112

Factor a perfect square on the left side:
(x + -1.166666667)(x + -1.166666667) = 52.361111112

Calculate the square root of the right side: 7.236097782

Break this problem into two subproblems by setting 
(x + -1.166666667) equal to 7.236097782 and -7.236097782.

Subproblem 1

x + -1.166666667 = 7.236097782 Simplifying x + -1.166666667 = 7.236097782 Reorder the terms: -1.166666667 + x = 7.236097782 Solving -1.166666667 + x = 7.236097782 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.166666667' to each side of the equation. -1.166666667 + 1.166666667 + x = 7.236097782 + 1.166666667 Combine like terms: -1.166666667 + 1.166666667 = 0.000000000 0.000000000 + x = 7.236097782 + 1.166666667 x = 7.236097782 + 1.166666667 Combine like terms: 7.236097782 + 1.166666667 = 8.402764449 x = 8.402764449 Simplifying x = 8.402764449

Subproblem 2

x + -1.166666667 = -7.236097782 Simplifying x + -1.166666667 = -7.236097782 Reorder the terms: -1.166666667 + x = -7.236097782 Solving -1.166666667 + x = -7.236097782 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.166666667' to each side of the equation. -1.166666667 + 1.166666667 + x = -7.236097782 + 1.166666667 Combine like terms: -1.166666667 + 1.166666667 = 0.000000000 0.000000000 + x = -7.236097782 + 1.166666667 x = -7.236097782 + 1.166666667 Combine like terms: -7.236097782 + 1.166666667 = -6.069431115 x = -6.069431115 Simplifying x = -6.069431115

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.402764449, -6.069431115}

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