0=10+35x-4.9x^2

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Solution for 0=10+35x-4.9x^2 equation:


Simplifying
0 = 10 + 35x + -4.9x2

Solving
0 = 10 + 35x + -4.9x2

Solving for variable 'x'.

Combine like terms: 0 + -10 = -10
-10 + -35x + 4.9x2 = 10 + 35x + -4.9x2 + -10 + -35x + 4.9x2

Reorder the terms:
-10 + -35x + 4.9x2 = 10 + -10 + 35x + -35x + -4.9x2 + 4.9x2

Combine like terms: 10 + -10 = 0
-10 + -35x + 4.9x2 = 0 + 35x + -35x + -4.9x2 + 4.9x2
-10 + -35x + 4.9x2 = 35x + -35x + -4.9x2 + 4.9x2

Combine like terms: 35x + -35x = 0
-10 + -35x + 4.9x2 = 0 + -4.9x2 + 4.9x2
-10 + -35x + 4.9x2 = -4.9x2 + 4.9x2

Combine like terms: -4.9x2 + 4.9x2 = 0.0
-10 + -35x + 4.9x2 = 0.0

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

Divide each side by '4.9'.
-2.040816327 + -7.142857143x + x2 = 0

Move the constant term to the right:

Add '2.040816327' to each side of the equation.
-2.040816327 + -7.142857143x + 2.040816327 + x2 = 0 + 2.040816327

Reorder the terms:
-2.040816327 + 2.040816327 + -7.142857143x + x2 = 0 + 2.040816327

Combine like terms: -2.040816327 + 2.040816327 = 0.000000000
0.000000000 + -7.142857143x + x2 = 0 + 2.040816327
-7.142857143x + x2 = 0 + 2.040816327

Combine like terms: 0 + 2.040816327 = 2.040816327
-7.142857143x + x2 = 2.040816327

The x term is -7.142857143x.  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.
-7.142857143x + 12.75510204 + x2 = 2.040816327 + 12.75510204

Reorder the terms:
12.75510204 + -7.142857143x + x2 = 2.040816327 + 12.75510204

Combine like terms: 2.040816327 + 12.75510204 = 14.795918367
12.75510204 + -7.142857143x + x2 = 14.795918367

Factor a perfect square on the left side:
(x + -3.571428572)(x + -3.571428572) = 14.795918367

Calculate the square root of the right side: 3.846546291

Break this problem into two subproblems by setting 
(x + -3.571428572) equal to 3.846546291 and -3.846546291.

Subproblem 1

x + -3.571428572 = 3.846546291 Simplifying x + -3.571428572 = 3.846546291 Reorder the terms: -3.571428572 + x = 3.846546291 Solving -3.571428572 + x = 3.846546291 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.571428572' to each side of the equation. -3.571428572 + 3.571428572 + x = 3.846546291 + 3.571428572 Combine like terms: -3.571428572 + 3.571428572 = 0.000000000 0.000000000 + x = 3.846546291 + 3.571428572 x = 3.846546291 + 3.571428572 Combine like terms: 3.846546291 + 3.571428572 = 7.417974863 x = 7.417974863 Simplifying x = 7.417974863

Subproblem 2

x + -3.571428572 = -3.846546291 Simplifying x + -3.571428572 = -3.846546291 Reorder the terms: -3.571428572 + x = -3.846546291 Solving -3.571428572 + x = -3.846546291 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.571428572' to each side of the equation. -3.571428572 + 3.571428572 + x = -3.846546291 + 3.571428572 Combine like terms: -3.571428572 + 3.571428572 = 0.000000000 0.000000000 + x = -3.846546291 + 3.571428572 x = -3.846546291 + 3.571428572 Combine like terms: -3.846546291 + 3.571428572 = -0.275117719 x = -0.275117719 Simplifying x = -0.275117719

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.417974863, -0.275117719}

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