7a^2+33=7-40a

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Solution for 7a^2+33=7-40a equation:


Simplifying
7a2 + 33 = 7 + -40a

Reorder the terms:
33 + 7a2 = 7 + -40a

Solving
33 + 7a2 = 7 + -40a

Solving for variable 'a'.

Reorder the terms:
33 + -7 + 40a + 7a2 = 7 + -40a + -7 + 40a

Combine like terms: 33 + -7 = 26
26 + 40a + 7a2 = 7 + -40a + -7 + 40a

Reorder the terms:
26 + 40a + 7a2 = 7 + -7 + -40a + 40a

Combine like terms: 7 + -7 = 0
26 + 40a + 7a2 = 0 + -40a + 40a
26 + 40a + 7a2 = -40a + 40a

Combine like terms: -40a + 40a = 0
26 + 40a + 7a2 = 0

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

Divide each side by '7'.
3.714285714 + 5.714285714a + a2 = 0

Move the constant term to the right:

Add '-3.714285714' to each side of the equation.
3.714285714 + 5.714285714a + -3.714285714 + a2 = 0 + -3.714285714

Reorder the terms:
3.714285714 + -3.714285714 + 5.714285714a + a2 = 0 + -3.714285714

Combine like terms: 3.714285714 + -3.714285714 = 0.000000000
0.000000000 + 5.714285714a + a2 = 0 + -3.714285714
5.714285714a + a2 = 0 + -3.714285714

Combine like terms: 0 + -3.714285714 = -3.714285714
5.714285714a + a2 = -3.714285714

The a term is 5.714285714a.  Take half its coefficient (2.857142857).
Square it (8.163265305) and add it to both sides.

Add '8.163265305' to each side of the equation.
5.714285714a + 8.163265305 + a2 = -3.714285714 + 8.163265305

Reorder the terms:
8.163265305 + 5.714285714a + a2 = -3.714285714 + 8.163265305

Combine like terms: -3.714285714 + 8.163265305 = 4.448979591
8.163265305 + 5.714285714a + a2 = 4.448979591

Factor a perfect square on the left side:
(a + 2.857142857)(a + 2.857142857) = 4.448979591

Calculate the square root of the right side: 2.109260437

Break this problem into two subproblems by setting 
(a + 2.857142857) equal to 2.109260437 and -2.109260437.

Subproblem 1

a + 2.857142857 = 2.109260437 Simplifying a + 2.857142857 = 2.109260437 Reorder the terms: 2.857142857 + a = 2.109260437 Solving 2.857142857 + a = 2.109260437 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2.857142857' to each side of the equation. 2.857142857 + -2.857142857 + a = 2.109260437 + -2.857142857 Combine like terms: 2.857142857 + -2.857142857 = 0.000000000 0.000000000 + a = 2.109260437 + -2.857142857 a = 2.109260437 + -2.857142857 Combine like terms: 2.109260437 + -2.857142857 = -0.74788242 a = -0.74788242 Simplifying a = -0.74788242

Subproblem 2

a + 2.857142857 = -2.109260437 Simplifying a + 2.857142857 = -2.109260437 Reorder the terms: 2.857142857 + a = -2.109260437 Solving 2.857142857 + a = -2.109260437 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2.857142857' to each side of the equation. 2.857142857 + -2.857142857 + a = -2.109260437 + -2.857142857 Combine like terms: 2.857142857 + -2.857142857 = 0.000000000 0.000000000 + a = -2.109260437 + -2.857142857 a = -2.109260437 + -2.857142857 Combine like terms: -2.109260437 + -2.857142857 = -4.966403294 a = -4.966403294 Simplifying a = -4.966403294

Solution

The solution to the problem is based on the solutions from the subproblems. a = {-0.74788242, -4.966403294}

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