4x^2+10x=27

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Solution for 4x^2+10x=27 equation:


Simplifying
4x2 + 10x = 27

Reorder the terms:
10x + 4x2 = 27

Solving
10x + 4x2 = 27

Solving for variable 'x'.

Reorder the terms:
-27 + 10x + 4x2 = 27 + -27

Combine like terms: 27 + -27 = 0
-27 + 10x + 4x2 = 0

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

Divide each side by '4'.
-6.75 + 2.5x + x2 = 0

Move the constant term to the right:

Add '6.75' to each side of the equation.
-6.75 + 2.5x + 6.75 + x2 = 0 + 6.75

Reorder the terms:
-6.75 + 6.75 + 2.5x + x2 = 0 + 6.75

Combine like terms: -6.75 + 6.75 = 0.00
0.00 + 2.5x + x2 = 0 + 6.75
2.5x + x2 = 0 + 6.75

Combine like terms: 0 + 6.75 = 6.75
2.5x + x2 = 6.75

The x term is 2.5x.  Take half its coefficient (1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
2.5x + 1.5625 + x2 = 6.75 + 1.5625

Reorder the terms:
1.5625 + 2.5x + x2 = 6.75 + 1.5625

Combine like terms: 6.75 + 1.5625 = 8.3125
1.5625 + 2.5x + x2 = 8.3125

Factor a perfect square on the left side:
(x + 1.25)(x + 1.25) = 8.3125

Calculate the square root of the right side: 2.883140649

Break this problem into two subproblems by setting 
(x + 1.25) equal to 2.883140649 and -2.883140649.

Subproblem 1

x + 1.25 = 2.883140649 Simplifying x + 1.25 = 2.883140649 Reorder the terms: 1.25 + x = 2.883140649 Solving 1.25 + x = 2.883140649 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = 2.883140649 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = 2.883140649 + -1.25 x = 2.883140649 + -1.25 Combine like terms: 2.883140649 + -1.25 = 1.633140649 x = 1.633140649 Simplifying x = 1.633140649

Subproblem 2

x + 1.25 = -2.883140649 Simplifying x + 1.25 = -2.883140649 Reorder the terms: 1.25 + x = -2.883140649 Solving 1.25 + x = -2.883140649 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = -2.883140649 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = -2.883140649 + -1.25 x = -2.883140649 + -1.25 Combine like terms: -2.883140649 + -1.25 = -4.133140649 x = -4.133140649 Simplifying x = -4.133140649

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.633140649, -4.133140649}

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