4x^2=-8x+17

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Solution for 4x^2=-8x+17 equation:


Simplifying
4x2 = -8x + 17

Reorder the terms:
4x2 = 17 + -8x

Solving
4x2 = 17 + -8x

Solving for variable 'x'.

Reorder the terms:
-17 + 8x + 4x2 = 17 + -8x + -17 + 8x

Reorder the terms:
-17 + 8x + 4x2 = 17 + -17 + -8x + 8x

Combine like terms: 17 + -17 = 0
-17 + 8x + 4x2 = 0 + -8x + 8x
-17 + 8x + 4x2 = -8x + 8x

Combine like terms: -8x + 8x = 0
-17 + 8x + 4x2 = 0

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

Divide each side by '4'.
-4.25 + 2x + x2 = 0

Move the constant term to the right:

Add '4.25' to each side of the equation.
-4.25 + 2x + 4.25 + x2 = 0 + 4.25

Reorder the terms:
-4.25 + 4.25 + 2x + x2 = 0 + 4.25

Combine like terms: -4.25 + 4.25 = 0.00
0.00 + 2x + x2 = 0 + 4.25
2x + x2 = 0 + 4.25

Combine like terms: 0 + 4.25 = 4.25
2x + x2 = 4.25

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 = 4.25 + 1

Reorder the terms:
1 + 2x + x2 = 4.25 + 1

Combine like terms: 4.25 + 1 = 5.25
1 + 2x + x2 = 5.25

Factor a perfect square on the left side:
(x + 1)(x + 1) = 5.25

Calculate the square root of the right side: 2.291287847

Break this problem into two subproblems by setting 
(x + 1) equal to 2.291287847 and -2.291287847.

Subproblem 1

x + 1 = 2.291287847 Simplifying x + 1 = 2.291287847 Reorder the terms: 1 + x = 2.291287847 Solving 1 + x = 2.291287847 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 = 2.291287847 + -1 Combine like terms: 1 + -1 = 0 0 + x = 2.291287847 + -1 x = 2.291287847 + -1 Combine like terms: 2.291287847 + -1 = 1.291287847 x = 1.291287847 Simplifying x = 1.291287847

Subproblem 2

x + 1 = -2.291287847 Simplifying x + 1 = -2.291287847 Reorder the terms: 1 + x = -2.291287847 Solving 1 + x = -2.291287847 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 = -2.291287847 + -1 Combine like terms: 1 + -1 = 0 0 + x = -2.291287847 + -1 x = -2.291287847 + -1 Combine like terms: -2.291287847 + -1 = -3.291287847 x = -3.291287847 Simplifying x = -3.291287847

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.291287847, -3.291287847}

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