-4.9x^2+9x+175=0

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Solution for -4.9x^2+9x+175=0 equation:


Simplifying
-4.9x2 + 9x + 175 = 0

Reorder the terms:
175 + 9x + -4.9x2 = 0

Solving
175 + 9x + -4.9x2 = 0

Solving for variable 'x'.

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

Divide each side by '-4.9'.
-35.71428571 + -1.836734694x + x2 = 0

Move the constant term to the right:

Add '35.71428571' to each side of the equation.
-35.71428571 + -1.836734694x + 35.71428571 + x2 = 0 + 35.71428571

Reorder the terms:
-35.71428571 + 35.71428571 + -1.836734694x + x2 = 0 + 35.71428571

Combine like terms: -35.71428571 + 35.71428571 = 0.00000000
0.00000000 + -1.836734694x + x2 = 0 + 35.71428571
-1.836734694x + x2 = 0 + 35.71428571

Combine like terms: 0 + 35.71428571 = 35.71428571
-1.836734694x + x2 = 35.71428571

The x term is -1.836734694x.  Take half its coefficient (-0.918367347).
Square it (0.8433985840) and add it to both sides.

Add '0.8433985840' to each side of the equation.
-1.836734694x + 0.8433985840 + x2 = 35.71428571 + 0.8433985840

Reorder the terms:
0.8433985840 + -1.836734694x + x2 = 35.71428571 + 0.8433985840

Combine like terms: 35.71428571 + 0.8433985840 = 36.557684294
0.8433985840 + -1.836734694x + x2 = 36.557684294

Factor a perfect square on the left side:
(x + -0.918367347)(x + -0.918367347) = 36.557684294

Calculate the square root of the right side: 6.046295088

Break this problem into two subproblems by setting 
(x + -0.918367347) equal to 6.046295088 and -6.046295088.

Subproblem 1

x + -0.918367347 = 6.046295088 Simplifying x + -0.918367347 = 6.046295088 Reorder the terms: -0.918367347 + x = 6.046295088 Solving -0.918367347 + x = 6.046295088 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.918367347' to each side of the equation. -0.918367347 + 0.918367347 + x = 6.046295088 + 0.918367347 Combine like terms: -0.918367347 + 0.918367347 = 0.000000000 0.000000000 + x = 6.046295088 + 0.918367347 x = 6.046295088 + 0.918367347 Combine like terms: 6.046295088 + 0.918367347 = 6.964662435 x = 6.964662435 Simplifying x = 6.964662435

Subproblem 2

x + -0.918367347 = -6.046295088 Simplifying x + -0.918367347 = -6.046295088 Reorder the terms: -0.918367347 + x = -6.046295088 Solving -0.918367347 + x = -6.046295088 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.918367347' to each side of the equation. -0.918367347 + 0.918367347 + x = -6.046295088 + 0.918367347 Combine like terms: -0.918367347 + 0.918367347 = 0.000000000 0.000000000 + x = -6.046295088 + 0.918367347 x = -6.046295088 + 0.918367347 Combine like terms: -6.046295088 + 0.918367347 = -5.127927741 x = -5.127927741 Simplifying x = -5.127927741

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.964662435, -5.127927741}

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