3x^2=17x+64

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Solution for 3x^2=17x+64 equation:


Simplifying
3x2 = 17x + 64

Reorder the terms:
3x2 = 64 + 17x

Solving
3x2 = 64 + 17x

Solving for variable 'x'.

Reorder the terms:
-64 + -17x + 3x2 = 64 + 17x + -64 + -17x

Reorder the terms:
-64 + -17x + 3x2 = 64 + -64 + 17x + -17x

Combine like terms: 64 + -64 = 0
-64 + -17x + 3x2 = 0 + 17x + -17x
-64 + -17x + 3x2 = 17x + -17x

Combine like terms: 17x + -17x = 0
-64 + -17x + 3x2 = 0

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

Divide each side by '3'.
-21.33333333 + -5.666666667x + x2 = 0

Move the constant term to the right:

Add '21.33333333' to each side of the equation.
-21.33333333 + -5.666666667x + 21.33333333 + x2 = 0 + 21.33333333

Reorder the terms:
-21.33333333 + 21.33333333 + -5.666666667x + x2 = 0 + 21.33333333

Combine like terms: -21.33333333 + 21.33333333 = 0.00000000
0.00000000 + -5.666666667x + x2 = 0 + 21.33333333
-5.666666667x + x2 = 0 + 21.33333333

Combine like terms: 0 + 21.33333333 = 21.33333333
-5.666666667x + x2 = 21.33333333

The x term is -5.666666667x.  Take half its coefficient (-2.833333334).
Square it (8.027777782) and add it to both sides.

Add '8.027777782' to each side of the equation.
-5.666666667x + 8.027777782 + x2 = 21.33333333 + 8.027777782

Reorder the terms:
8.027777782 + -5.666666667x + x2 = 21.33333333 + 8.027777782

Combine like terms: 21.33333333 + 8.027777782 = 29.361111112
8.027777782 + -5.666666667x + x2 = 29.361111112

Factor a perfect square on the left side:
(x + -2.833333334)(x + -2.833333334) = 29.361111112

Calculate the square root of the right side: 5.418589402

Break this problem into two subproblems by setting 
(x + -2.833333334) equal to 5.418589402 and -5.418589402.

Subproblem 1

x + -2.833333334 = 5.418589402 Simplifying x + -2.833333334 = 5.418589402 Reorder the terms: -2.833333334 + x = 5.418589402 Solving -2.833333334 + x = 5.418589402 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.833333334' to each side of the equation. -2.833333334 + 2.833333334 + x = 5.418589402 + 2.833333334 Combine like terms: -2.833333334 + 2.833333334 = 0.000000000 0.000000000 + x = 5.418589402 + 2.833333334 x = 5.418589402 + 2.833333334 Combine like terms: 5.418589402 + 2.833333334 = 8.251922736 x = 8.251922736 Simplifying x = 8.251922736

Subproblem 2

x + -2.833333334 = -5.418589402 Simplifying x + -2.833333334 = -5.418589402 Reorder the terms: -2.833333334 + x = -5.418589402 Solving -2.833333334 + x = -5.418589402 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.833333334' to each side of the equation. -2.833333334 + 2.833333334 + x = -5.418589402 + 2.833333334 Combine like terms: -2.833333334 + 2.833333334 = 0.000000000 0.000000000 + x = -5.418589402 + 2.833333334 x = -5.418589402 + 2.833333334 Combine like terms: -5.418589402 + 2.833333334 = -2.585256068 x = -2.585256068 Simplifying x = -2.585256068

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.251922736, -2.585256068}

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