-4.9x^2-17.5x+60=0

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Solution for -4.9x^2-17.5x+60=0 equation:


Simplifying
-4.9x2 + -17.5x + 60 = 0

Reorder the terms:
60 + -17.5x + -4.9x2 = 0

Solving
60 + -17.5x + -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'.
-12.24489796 + 3.571428571x + x2 = 0

Move the constant term to the right:

Add '12.24489796' to each side of the equation.
-12.24489796 + 3.571428571x + 12.24489796 + x2 = 0 + 12.24489796

Reorder the terms:
-12.24489796 + 12.24489796 + 3.571428571x + x2 = 0 + 12.24489796

Combine like terms: -12.24489796 + 12.24489796 = 0.00000000
0.00000000 + 3.571428571x + x2 = 0 + 12.24489796
3.571428571x + x2 = 0 + 12.24489796

Combine like terms: 0 + 12.24489796 = 12.24489796
3.571428571x + x2 = 12.24489796

The x term is 3.571428571x.  Take half its coefficient (1.785714286).
Square it (3.188775511) and add it to both sides.

Add '3.188775511' to each side of the equation.
3.571428571x + 3.188775511 + x2 = 12.24489796 + 3.188775511

Reorder the terms:
3.188775511 + 3.571428571x + x2 = 12.24489796 + 3.188775511

Combine like terms: 12.24489796 + 3.188775511 = 15.433673471
3.188775511 + 3.571428571x + x2 = 15.433673471

Factor a perfect square on the left side:
(x + 1.785714286)(x + 1.785714286) = 15.433673471

Calculate the square root of the right side: 3.928571429

Break this problem into two subproblems by setting 
(x + 1.785714286) equal to 3.928571429 and -3.928571429.

Subproblem 1

x + 1.785714286 = 3.928571429 Simplifying x + 1.785714286 = 3.928571429 Reorder the terms: 1.785714286 + x = 3.928571429 Solving 1.785714286 + x = 3.928571429 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.785714286' to each side of the equation. 1.785714286 + -1.785714286 + x = 3.928571429 + -1.785714286 Combine like terms: 1.785714286 + -1.785714286 = 0.000000000 0.000000000 + x = 3.928571429 + -1.785714286 x = 3.928571429 + -1.785714286 Combine like terms: 3.928571429 + -1.785714286 = 2.142857143 x = 2.142857143 Simplifying x = 2.142857143

Subproblem 2

x + 1.785714286 = -3.928571429 Simplifying x + 1.785714286 = -3.928571429 Reorder the terms: 1.785714286 + x = -3.928571429 Solving 1.785714286 + x = -3.928571429 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.785714286' to each side of the equation. 1.785714286 + -1.785714286 + x = -3.928571429 + -1.785714286 Combine like terms: 1.785714286 + -1.785714286 = 0.000000000 0.000000000 + x = -3.928571429 + -1.785714286 x = -3.928571429 + -1.785714286 Combine like terms: -3.928571429 + -1.785714286 = -5.714285715 x = -5.714285715 Simplifying x = -5.714285715

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.142857143, -5.714285715}

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