17x(5x-4)=64

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Solution for 17x(5x-4)=64 equation:


Simplifying
17x(5x + -4) = 64

Reorder the terms:
17x(-4 + 5x) = 64
(-4 * 17x + 5x * 17x) = 64
(-68x + 85x2) = 64

Solving
-68x + 85x2 = 64

Solving for variable 'x'.

Reorder the terms:
-64 + -68x + 85x2 = 64 + -64

Combine like terms: 64 + -64 = 0
-64 + -68x + 85x2 = 0

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

Divide each side by '85'.
-0.7529411765 + -0.8x + x2 = 0

Move the constant term to the right:

Add '0.7529411765' to each side of the equation.
-0.7529411765 + -0.8x + 0.7529411765 + x2 = 0 + 0.7529411765

Reorder the terms:
-0.7529411765 + 0.7529411765 + -0.8x + x2 = 0 + 0.7529411765

Combine like terms: -0.7529411765 + 0.7529411765 = 0.0000000000
0.0000000000 + -0.8x + x2 = 0 + 0.7529411765
-0.8x + x2 = 0 + 0.7529411765

Combine like terms: 0 + 0.7529411765 = 0.7529411765
-0.8x + x2 = 0.7529411765

The x term is -0.8x.  Take half its coefficient (-0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
-0.8x + 0.16 + x2 = 0.7529411765 + 0.16

Reorder the terms:
0.16 + -0.8x + x2 = 0.7529411765 + 0.16

Combine like terms: 0.7529411765 + 0.16 = 0.9129411765
0.16 + -0.8x + x2 = 0.9129411765

Factor a perfect square on the left side:
(x + -0.4)(x + -0.4) = 0.9129411765

Calculate the square root of the right side: 0.955479553

Break this problem into two subproblems by setting 
(x + -0.4) equal to 0.955479553 and -0.955479553.

Subproblem 1

x + -0.4 = 0.955479553 Simplifying x + -0.4 = 0.955479553 Reorder the terms: -0.4 + x = 0.955479553 Solving -0.4 + x = 0.955479553 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = 0.955479553 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = 0.955479553 + 0.4 x = 0.955479553 + 0.4 Combine like terms: 0.955479553 + 0.4 = 1.355479553 x = 1.355479553 Simplifying x = 1.355479553

Subproblem 2

x + -0.4 = -0.955479553 Simplifying x + -0.4 = -0.955479553 Reorder the terms: -0.4 + x = -0.955479553 Solving -0.4 + x = -0.955479553 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = -0.955479553 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = -0.955479553 + 0.4 x = -0.955479553 + 0.4 Combine like terms: -0.955479553 + 0.4 = -0.555479553 x = -0.555479553 Simplifying x = -0.555479553

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.355479553, -0.555479553}

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