25x^2+45x-11=0

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Solution for 25x^2+45x-11=0 equation:


Simplifying
25x2 + 45x + -11 = 0

Reorder the terms:
-11 + 45x + 25x2 = 0

Solving
-11 + 45x + 25x2 = 0

Solving for variable 'x'.

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

Divide each side by '25'.
-0.44 + 1.8x + x2 = 0

Move the constant term to the right:

Add '0.44' to each side of the equation.
-0.44 + 1.8x + 0.44 + x2 = 0 + 0.44

Reorder the terms:
-0.44 + 0.44 + 1.8x + x2 = 0 + 0.44

Combine like terms: -0.44 + 0.44 = 0.00
0.00 + 1.8x + x2 = 0 + 0.44
1.8x + x2 = 0 + 0.44

Combine like terms: 0 + 0.44 = 0.44
1.8x + x2 = 0.44

The x term is 1.8x.  Take half its coefficient (0.9).
Square it (0.81) and add it to both sides.

Add '0.81' to each side of the equation.
1.8x + 0.81 + x2 = 0.44 + 0.81

Reorder the terms:
0.81 + 1.8x + x2 = 0.44 + 0.81

Combine like terms: 0.44 + 0.81 = 1.25
0.81 + 1.8x + x2 = 1.25

Factor a perfect square on the left side:
(x + 0.9)(x + 0.9) = 1.25

Calculate the square root of the right side: 1.118033989

Break this problem into two subproblems by setting 
(x + 0.9) equal to 1.118033989 and -1.118033989.

Subproblem 1

x + 0.9 = 1.118033989 Simplifying x + 0.9 = 1.118033989 Reorder the terms: 0.9 + x = 1.118033989 Solving 0.9 + x = 1.118033989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = 1.118033989 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = 1.118033989 + -0.9 x = 1.118033989 + -0.9 Combine like terms: 1.118033989 + -0.9 = 0.218033989 x = 0.218033989 Simplifying x = 0.218033989

Subproblem 2

x + 0.9 = -1.118033989 Simplifying x + 0.9 = -1.118033989 Reorder the terms: 0.9 + x = -1.118033989 Solving 0.9 + x = -1.118033989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = -1.118033989 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = -1.118033989 + -0.9 x = -1.118033989 + -0.9 Combine like terms: -1.118033989 + -0.9 = -2.018033989 x = -2.018033989 Simplifying x = -2.018033989

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.218033989, -2.018033989}

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