-4.9x^2+19.6x+58.8=70

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Solution for -4.9x^2+19.6x+58.8=70 equation:


Simplifying
-4.9x2 + 19.6x + 58.8 = 70

Reorder the terms:
58.8 + 19.6x + -4.9x2 = 70

Solving
58.8 + 19.6x + -4.9x2 = 70

Solving for variable 'x'.

Reorder the terms:
58.8 + -70 + 19.6x + -4.9x2 = 70 + -70

Combine like terms: 58.8 + -70 = -11.2
-11.2 + 19.6x + -4.9x2 = 70 + -70

Combine like terms: 70 + -70 = 0
-11.2 + 19.6x + -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'.
2.285714286 + -4x + x2 = 0

Move the constant term to the right:

Add '-2.285714286' to each side of the equation.
2.285714286 + -4x + -2.285714286 + x2 = 0 + -2.285714286

Reorder the terms:
2.285714286 + -2.285714286 + -4x + x2 = 0 + -2.285714286

Combine like terms: 2.285714286 + -2.285714286 = 0.000000000
0.000000000 + -4x + x2 = 0 + -2.285714286
-4x + x2 = 0 + -2.285714286

Combine like terms: 0 + -2.285714286 = -2.285714286
-4x + x2 = -2.285714286

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = -2.285714286 + 4

Reorder the terms:
4 + -4x + x2 = -2.285714286 + 4

Combine like terms: -2.285714286 + 4 = 1.714285714
4 + -4x + x2 = 1.714285714

Factor a perfect square on the left side:
(x + -2)(x + -2) = 1.714285714

Calculate the square root of the right side: 1.309307341

Break this problem into two subproblems by setting 
(x + -2) equal to 1.309307341 and -1.309307341.

Subproblem 1

x + -2 = 1.309307341 Simplifying x + -2 = 1.309307341 Reorder the terms: -2 + x = 1.309307341 Solving -2 + x = 1.309307341 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 1.309307341 + 2 Combine like terms: -2 + 2 = 0 0 + x = 1.309307341 + 2 x = 1.309307341 + 2 Combine like terms: 1.309307341 + 2 = 3.309307341 x = 3.309307341 Simplifying x = 3.309307341

Subproblem 2

x + -2 = -1.309307341 Simplifying x + -2 = -1.309307341 Reorder the terms: -2 + x = -1.309307341 Solving -2 + x = -1.309307341 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -1.309307341 + 2 Combine like terms: -2 + 2 = 0 0 + x = -1.309307341 + 2 x = -1.309307341 + 2 Combine like terms: -1.309307341 + 2 = 0.690692659 x = 0.690692659 Simplifying x = 0.690692659

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.309307341, 0.690692659}

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