7a^2+50a=7

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Solution for 7a^2+50a=7 equation:


Simplifying
7a2 + 50a = 7

Reorder the terms:
50a + 7a2 = 7

Solving
50a + 7a2 = 7

Solving for variable 'a'.

Reorder the terms:
-7 + 50a + 7a2 = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + 50a + 7a2 = 0

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

Divide each side by '7'.
-1 + 7.142857143a + a2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 7.142857143a + 1 + a2 = 0 + 1

Reorder the terms:
-1 + 1 + 7.142857143a + a2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 7.142857143a + a2 = 0 + 1
7.142857143a + a2 = 0 + 1

Combine like terms: 0 + 1 = 1
7.142857143a + a2 = 1

The a term is 7.142857143a.  Take half its coefficient (3.571428572).
Square it (12.75510204) and add it to both sides.

Add '12.75510204' to each side of the equation.
7.142857143a + 12.75510204 + a2 = 1 + 12.75510204

Reorder the terms:
12.75510204 + 7.142857143a + a2 = 1 + 12.75510204

Combine like terms: 1 + 12.75510204 = 13.75510204
12.75510204 + 7.142857143a + a2 = 13.75510204

Factor a perfect square on the left side:
(a + 3.571428572)(a + 3.571428572) = 13.75510204

Calculate the square root of the right side: 3.708787139

Break this problem into two subproblems by setting 
(a + 3.571428572) equal to 3.708787139 and -3.708787139.

Subproblem 1

a + 3.571428572 = 3.708787139 Simplifying a + 3.571428572 = 3.708787139 Reorder the terms: 3.571428572 + a = 3.708787139 Solving 3.571428572 + a = 3.708787139 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-3.571428572' to each side of the equation. 3.571428572 + -3.571428572 + a = 3.708787139 + -3.571428572 Combine like terms: 3.571428572 + -3.571428572 = 0.000000000 0.000000000 + a = 3.708787139 + -3.571428572 a = 3.708787139 + -3.571428572 Combine like terms: 3.708787139 + -3.571428572 = 0.137358567 a = 0.137358567 Simplifying a = 0.137358567

Subproblem 2

a + 3.571428572 = -3.708787139 Simplifying a + 3.571428572 = -3.708787139 Reorder the terms: 3.571428572 + a = -3.708787139 Solving 3.571428572 + a = -3.708787139 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-3.571428572' to each side of the equation. 3.571428572 + -3.571428572 + a = -3.708787139 + -3.571428572 Combine like terms: 3.571428572 + -3.571428572 = 0.000000000 0.000000000 + a = -3.708787139 + -3.571428572 a = -3.708787139 + -3.571428572 Combine like terms: -3.708787139 + -3.571428572 = -7.280215711 a = -7.280215711 Simplifying a = -7.280215711

Solution

The solution to the problem is based on the solutions from the subproblems. a = {0.137358567, -7.280215711}

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