-4.9x^2+3.5x+10=1

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Solution for -4.9x^2+3.5x+10=1 equation:


Simplifying
-4.9x2 + 3.5x + 10 = 1

Reorder the terms:
10 + 3.5x + -4.9x2 = 1

Solving
10 + 3.5x + -4.9x2 = 1

Solving for variable 'x'.

Reorder the terms:
10 + -1 + 3.5x + -4.9x2 = 1 + -1

Combine like terms: 10 + -1 = 9
9 + 3.5x + -4.9x2 = 1 + -1

Combine like terms: 1 + -1 = 0
9 + 3.5x + -4.9x2 = 0

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

Divide each side by '-4.9'.
-1.836734694 + -0.7142857143x + x2 = 0

Move the constant term to the right:

Add '1.836734694' to each side of the equation.
-1.836734694 + -0.7142857143x + 1.836734694 + x2 = 0 + 1.836734694

Reorder the terms:
-1.836734694 + 1.836734694 + -0.7142857143x + x2 = 0 + 1.836734694

Combine like terms: -1.836734694 + 1.836734694 = 0.000000000
0.000000000 + -0.7142857143x + x2 = 0 + 1.836734694
-0.7142857143x + x2 = 0 + 1.836734694

Combine like terms: 0 + 1.836734694 = 1.836734694
-0.7142857143x + x2 = 1.836734694

The x term is -0.7142857143x.  Take half its coefficient (-0.3571428572).
Square it (0.1275510204) and add it to both sides.

Add '0.1275510204' to each side of the equation.
-0.7142857143x + 0.1275510204 + x2 = 1.836734694 + 0.1275510204

Reorder the terms:
0.1275510204 + -0.7142857143x + x2 = 1.836734694 + 0.1275510204

Combine like terms: 1.836734694 + 0.1275510204 = 1.9642857144
0.1275510204 + -0.7142857143x + x2 = 1.9642857144

Factor a perfect square on the left side:
(x + -0.3571428572)(x + -0.3571428572) = 1.9642857144

Calculate the square root of the right side: 1.401529776

Break this problem into two subproblems by setting 
(x + -0.3571428572) equal to 1.401529776 and -1.401529776.

Subproblem 1

x + -0.3571428572 = 1.401529776 Simplifying x + -0.3571428572 = 1.401529776 Reorder the terms: -0.3571428572 + x = 1.401529776 Solving -0.3571428572 + x = 1.401529776 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3571428572' to each side of the equation. -0.3571428572 + 0.3571428572 + x = 1.401529776 + 0.3571428572 Combine like terms: -0.3571428572 + 0.3571428572 = 0.0000000000 0.0000000000 + x = 1.401529776 + 0.3571428572 x = 1.401529776 + 0.3571428572 Combine like terms: 1.401529776 + 0.3571428572 = 1.7586726332 x = 1.7586726332 Simplifying x = 1.7586726332

Subproblem 2

x + -0.3571428572 = -1.401529776 Simplifying x + -0.3571428572 = -1.401529776 Reorder the terms: -0.3571428572 + x = -1.401529776 Solving -0.3571428572 + x = -1.401529776 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3571428572' to each side of the equation. -0.3571428572 + 0.3571428572 + x = -1.401529776 + 0.3571428572 Combine like terms: -0.3571428572 + 0.3571428572 = 0.0000000000 0.0000000000 + x = -1.401529776 + 0.3571428572 x = -1.401529776 + 0.3571428572 Combine like terms: -1.401529776 + 0.3571428572 = -1.0443869188 x = -1.0443869188 Simplifying x = -1.0443869188

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.7586726332, -1.0443869188}

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