-4.9x^2+14.7x-10=0

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Solution for -4.9x^2+14.7x-10=0 equation:


Simplifying
-4.9x2 + 14.7x + -10 = 0

Reorder the terms:
-10 + 14.7x + -4.9x2 = 0

Solving
-10 + 14.7x + -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'.
2.040816327 + -3x + x2 = 0

Move the constant term to the right:

Add '-2.040816327' to each side of the equation.
2.040816327 + -3x + -2.040816327 + x2 = 0 + -2.040816327

Reorder the terms:
2.040816327 + -2.040816327 + -3x + x2 = 0 + -2.040816327

Combine like terms: 2.040816327 + -2.040816327 = 0.000000000
0.000000000 + -3x + x2 = 0 + -2.040816327
-3x + x2 = 0 + -2.040816327

Combine like terms: 0 + -2.040816327 = -2.040816327
-3x + x2 = -2.040816327

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = -2.040816327 + 2.25

Reorder the terms:
2.25 + -3x + x2 = -2.040816327 + 2.25

Combine like terms: -2.040816327 + 2.25 = 0.209183673
2.25 + -3x + x2 = 0.209183673

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 0.209183673

Calculate the square root of the right side: 0.457366016

Break this problem into two subproblems by setting 
(x + -1.5) equal to 0.457366016 and -0.457366016.

Subproblem 1

x + -1.5 = 0.457366016 Simplifying x + -1.5 = 0.457366016 Reorder the terms: -1.5 + x = 0.457366016 Solving -1.5 + x = 0.457366016 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 0.457366016 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 0.457366016 + 1.5 x = 0.457366016 + 1.5 Combine like terms: 0.457366016 + 1.5 = 1.957366016 x = 1.957366016 Simplifying x = 1.957366016

Subproblem 2

x + -1.5 = -0.457366016 Simplifying x + -1.5 = -0.457366016 Reorder the terms: -1.5 + x = -0.457366016 Solving -1.5 + x = -0.457366016 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -0.457366016 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -0.457366016 + 1.5 x = -0.457366016 + 1.5 Combine like terms: -0.457366016 + 1.5 = 1.042633984 x = 1.042633984 Simplifying x = 1.042633984

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.957366016, 1.042633984}

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