4d^2+29d-60=0

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Solution for 4d^2+29d-60=0 equation:


Simplifying
4d2 + 29d + -60 = 0

Reorder the terms:
-60 + 29d + 4d2 = 0

Solving
-60 + 29d + 4d2 = 0

Solving for variable 'd'.

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

Divide each side by '4'.
-15 + 7.25d + d2 = 0

Move the constant term to the right:

Add '15' to each side of the equation.
-15 + 7.25d + 15 + d2 = 0 + 15

Reorder the terms:
-15 + 15 + 7.25d + d2 = 0 + 15

Combine like terms: -15 + 15 = 0
0 + 7.25d + d2 = 0 + 15
7.25d + d2 = 0 + 15

Combine like terms: 0 + 15 = 15
7.25d + d2 = 15

The d term is 7.25d.  Take half its coefficient (3.625).
Square it (13.140625) and add it to both sides.

Add '13.140625' to each side of the equation.
7.25d + 13.140625 + d2 = 15 + 13.140625

Reorder the terms:
13.140625 + 7.25d + d2 = 15 + 13.140625

Combine like terms: 15 + 13.140625 = 28.140625
13.140625 + 7.25d + d2 = 28.140625

Factor a perfect square on the left side:
(d + 3.625)(d + 3.625) = 28.140625

Calculate the square root of the right side: 5.304773793

Break this problem into two subproblems by setting 
(d + 3.625) equal to 5.304773793 and -5.304773793.

Subproblem 1

d + 3.625 = 5.304773793 Simplifying d + 3.625 = 5.304773793 Reorder the terms: 3.625 + d = 5.304773793 Solving 3.625 + d = 5.304773793 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-3.625' to each side of the equation. 3.625 + -3.625 + d = 5.304773793 + -3.625 Combine like terms: 3.625 + -3.625 = 0.000 0.000 + d = 5.304773793 + -3.625 d = 5.304773793 + -3.625 Combine like terms: 5.304773793 + -3.625 = 1.679773793 d = 1.679773793 Simplifying d = 1.679773793

Subproblem 2

d + 3.625 = -5.304773793 Simplifying d + 3.625 = -5.304773793 Reorder the terms: 3.625 + d = -5.304773793 Solving 3.625 + d = -5.304773793 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-3.625' to each side of the equation. 3.625 + -3.625 + d = -5.304773793 + -3.625 Combine like terms: 3.625 + -3.625 = 0.000 0.000 + d = -5.304773793 + -3.625 d = -5.304773793 + -3.625 Combine like terms: -5.304773793 + -3.625 = -8.929773793 d = -8.929773793 Simplifying d = -8.929773793

Solution

The solution to the problem is based on the solutions from the subproblems. d = {1.679773793, -8.929773793}

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