4.9x^2-18x+6=0

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Solution for 4.9x^2-18x+6=0 equation:


Simplifying
4.9x2 + -18x + 6 = 0

Reorder the terms:
6 + -18x + 4.9x2 = 0

Solving
6 + -18x + 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'.
1.224489796 + -3.673469388x + x2 = 0

Move the constant term to the right:

Add '-1.224489796' to each side of the equation.
1.224489796 + -3.673469388x + -1.224489796 + x2 = 0 + -1.224489796

Reorder the terms:
1.224489796 + -1.224489796 + -3.673469388x + x2 = 0 + -1.224489796

Combine like terms: 1.224489796 + -1.224489796 = 0.000000000
0.000000000 + -3.673469388x + x2 = 0 + -1.224489796
-3.673469388x + x2 = 0 + -1.224489796

Combine like terms: 0 + -1.224489796 = -1.224489796
-3.673469388x + x2 = -1.224489796

The x term is -3.673469388x.  Take half its coefficient (-1.836734694).
Square it (3.373594336) and add it to both sides.

Add '3.373594336' to each side of the equation.
-3.673469388x + 3.373594336 + x2 = -1.224489796 + 3.373594336

Reorder the terms:
3.373594336 + -3.673469388x + x2 = -1.224489796 + 3.373594336

Combine like terms: -1.224489796 + 3.373594336 = 2.14910454
3.373594336 + -3.673469388x + x2 = 2.14910454

Factor a perfect square on the left side:
(x + -1.836734694)(x + -1.836734694) = 2.14910454

Calculate the square root of the right side: 1.465982449

Break this problem into two subproblems by setting 
(x + -1.836734694) equal to 1.465982449 and -1.465982449.

Subproblem 1

x + -1.836734694 = 1.465982449 Simplifying x + -1.836734694 = 1.465982449 Reorder the terms: -1.836734694 + x = 1.465982449 Solving -1.836734694 + x = 1.465982449 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.836734694' to each side of the equation. -1.836734694 + 1.836734694 + x = 1.465982449 + 1.836734694 Combine like terms: -1.836734694 + 1.836734694 = 0.000000000 0.000000000 + x = 1.465982449 + 1.836734694 x = 1.465982449 + 1.836734694 Combine like terms: 1.465982449 + 1.836734694 = 3.302717143 x = 3.302717143 Simplifying x = 3.302717143

Subproblem 2

x + -1.836734694 = -1.465982449 Simplifying x + -1.836734694 = -1.465982449 Reorder the terms: -1.836734694 + x = -1.465982449 Solving -1.836734694 + x = -1.465982449 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.836734694' to each side of the equation. -1.836734694 + 1.836734694 + x = -1.465982449 + 1.836734694 Combine like terms: -1.836734694 + 1.836734694 = 0.000000000 0.000000000 + x = -1.465982449 + 1.836734694 x = -1.465982449 + 1.836734694 Combine like terms: -1.465982449 + 1.836734694 = 0.370752245 x = 0.370752245 Simplifying x = 0.370752245

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.302717143, 0.370752245}

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