4x^2+25x-60=0

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Solution for 4x^2+25x-60=0 equation:


Simplifying
4x2 + 25x + -60 = 0

Reorder the terms:
-60 + 25x + 4x2 = 0

Solving
-60 + 25x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-15 + 6.25x + x2 = 0

Move the constant term to the right:

Add '15' to each side of the equation.
-15 + 6.25x + 15 + x2 = 0 + 15

Reorder the terms:
-15 + 15 + 6.25x + x2 = 0 + 15

Combine like terms: -15 + 15 = 0
0 + 6.25x + x2 = 0 + 15
6.25x + x2 = 0 + 15

Combine like terms: 0 + 15 = 15
6.25x + x2 = 15

The x term is 6.25x.  Take half its coefficient (3.125).
Square it (9.765625) and add it to both sides.

Add '9.765625' to each side of the equation.
6.25x + 9.765625 + x2 = 15 + 9.765625

Reorder the terms:
9.765625 + 6.25x + x2 = 15 + 9.765625

Combine like terms: 15 + 9.765625 = 24.765625
9.765625 + 6.25x + x2 = 24.765625

Factor a perfect square on the left side:
(x + 3.125)(x + 3.125) = 24.765625

Calculate the square root of the right side: 4.976507309

Break this problem into two subproblems by setting 
(x + 3.125) equal to 4.976507309 and -4.976507309.

Subproblem 1

x + 3.125 = 4.976507309 Simplifying x + 3.125 = 4.976507309 Reorder the terms: 3.125 + x = 4.976507309 Solving 3.125 + x = 4.976507309 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.125' to each side of the equation. 3.125 + -3.125 + x = 4.976507309 + -3.125 Combine like terms: 3.125 + -3.125 = 0.000 0.000 + x = 4.976507309 + -3.125 x = 4.976507309 + -3.125 Combine like terms: 4.976507309 + -3.125 = 1.851507309 x = 1.851507309 Simplifying x = 1.851507309

Subproblem 2

x + 3.125 = -4.976507309 Simplifying x + 3.125 = -4.976507309 Reorder the terms: 3.125 + x = -4.976507309 Solving 3.125 + x = -4.976507309 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.125' to each side of the equation. 3.125 + -3.125 + x = -4.976507309 + -3.125 Combine like terms: 3.125 + -3.125 = 0.000 0.000 + x = -4.976507309 + -3.125 x = -4.976507309 + -3.125 Combine like terms: -4.976507309 + -3.125 = -8.101507309 x = -8.101507309 Simplifying x = -8.101507309

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.851507309, -8.101507309}

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