2a^2+15a-250=

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Solution for 2a^2+15a-250= equation:


Simplifying
2a2 + 15a + -250 = 0

Reorder the terms:
-250 + 15a + 2a2 = 0

Solving
-250 + 15a + 2a2 = 0

Solving for variable 'a'.

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

Divide each side by '2'.
-125 + 7.5a + a2 = 0

Move the constant term to the right:

Add '125' to each side of the equation.
-125 + 7.5a + 125 + a2 = 0 + 125

Reorder the terms:
-125 + 125 + 7.5a + a2 = 0 + 125

Combine like terms: -125 + 125 = 0
0 + 7.5a + a2 = 0 + 125
7.5a + a2 = 0 + 125

Combine like terms: 0 + 125 = 125
7.5a + a2 = 125

The a term is 7.5a.  Take half its coefficient (3.75).
Square it (14.0625) and add it to both sides.

Add '14.0625' to each side of the equation.
7.5a + 14.0625 + a2 = 125 + 14.0625

Reorder the terms:
14.0625 + 7.5a + a2 = 125 + 14.0625

Combine like terms: 125 + 14.0625 = 139.0625
14.0625 + 7.5a + a2 = 139.0625

Factor a perfect square on the left side:
(a + 3.75)(a + 3.75) = 139.0625

Calculate the square root of the right side: 11.792476415

Break this problem into two subproblems by setting 
(a + 3.75) equal to 11.792476415 and -11.792476415.

Subproblem 1

a + 3.75 = 11.792476415 Simplifying a + 3.75 = 11.792476415 Reorder the terms: 3.75 + a = 11.792476415 Solving 3.75 + a = 11.792476415 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-3.75' to each side of the equation. 3.75 + -3.75 + a = 11.792476415 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + a = 11.792476415 + -3.75 a = 11.792476415 + -3.75 Combine like terms: 11.792476415 + -3.75 = 8.042476415 a = 8.042476415 Simplifying a = 8.042476415

Subproblem 2

a + 3.75 = -11.792476415 Simplifying a + 3.75 = -11.792476415 Reorder the terms: 3.75 + a = -11.792476415 Solving 3.75 + a = -11.792476415 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-3.75' to each side of the equation. 3.75 + -3.75 + a = -11.792476415 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + a = -11.792476415 + -3.75 a = -11.792476415 + -3.75 Combine like terms: -11.792476415 + -3.75 = -15.542476415 a = -15.542476415 Simplifying a = -15.542476415

Solution

The solution to the problem is based on the solutions from the subproblems. a = {8.042476415, -15.542476415}

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