0=-4.9x^2+2.29x+0.5

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Solution for 0=-4.9x^2+2.29x+0.5 equation:


Simplifying
0 = -4.9x2 + 2.29x + 0.5

Reorder the terms:
0 = 0.5 + 2.29x + -4.9x2

Solving
0 = 0.5 + 2.29x + -4.9x2

Solving for variable 'x'.

Combine like terms: 0 + -0.5 = -0.5
-0.5 + -2.29x + 4.9x2 = 0.5 + 2.29x + -4.9x2 + -0.5 + -2.29x + 4.9x2

Reorder the terms:
-0.5 + -2.29x + 4.9x2 = 0.5 + -0.5 + 2.29x + -2.29x + -4.9x2 + 4.9x2

Combine like terms: 0.5 + -0.5 = 0.0
-0.5 + -2.29x + 4.9x2 = 0.0 + 2.29x + -2.29x + -4.9x2 + 4.9x2
-0.5 + -2.29x + 4.9x2 = 2.29x + -2.29x + -4.9x2 + 4.9x2

Combine like terms: 2.29x + -2.29x = 0.00
-0.5 + -2.29x + 4.9x2 = 0.00 + -4.9x2 + 4.9x2
-0.5 + -2.29x + 4.9x2 = -4.9x2 + 4.9x2

Combine like terms: -4.9x2 + 4.9x2 = 0.0
-0.5 + -2.29x + 4.9x2 = 0.0

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

Divide each side by '4.9'.
-0.1020408163 + -0.4673469388x + x2 = 0

Move the constant term to the right:

Add '0.1020408163' to each side of the equation.
-0.1020408163 + -0.4673469388x + 0.1020408163 + x2 = 0 + 0.1020408163

Reorder the terms:
-0.1020408163 + 0.1020408163 + -0.4673469388x + x2 = 0 + 0.1020408163

Combine like terms: -0.1020408163 + 0.1020408163 = 0.0000000000
0.0000000000 + -0.4673469388x + x2 = 0 + 0.1020408163
-0.4673469388x + x2 = 0 + 0.1020408163

Combine like terms: 0 + 0.1020408163 = 0.1020408163
-0.4673469388x + x2 = 0.1020408163

The x term is -0.4673469388x.  Take half its coefficient (-0.2336734694).
Square it (0.05460329030) and add it to both sides.

Add '0.05460329030' to each side of the equation.
-0.4673469388x + 0.05460329030 + x2 = 0.1020408163 + 0.05460329030

Reorder the terms:
0.05460329030 + -0.4673469388x + x2 = 0.1020408163 + 0.05460329030

Combine like terms: 0.1020408163 + 0.05460329030 = 0.1566441066
0.05460329030 + -0.4673469388x + x2 = 0.1566441066

Factor a perfect square on the left side:
(x + -0.2336734694)(x + -0.2336734694) = 0.1566441066

Calculate the square root of the right side: 0.395782903

Break this problem into two subproblems by setting 
(x + -0.2336734694) equal to 0.395782903 and -0.395782903.

Subproblem 1

x + -0.2336734694 = 0.395782903 Simplifying x + -0.2336734694 = 0.395782903 Reorder the terms: -0.2336734694 + x = 0.395782903 Solving -0.2336734694 + x = 0.395782903 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2336734694' to each side of the equation. -0.2336734694 + 0.2336734694 + x = 0.395782903 + 0.2336734694 Combine like terms: -0.2336734694 + 0.2336734694 = 0.0000000000 0.0000000000 + x = 0.395782903 + 0.2336734694 x = 0.395782903 + 0.2336734694 Combine like terms: 0.395782903 + 0.2336734694 = 0.6294563724 x = 0.6294563724 Simplifying x = 0.6294563724

Subproblem 2

x + -0.2336734694 = -0.395782903 Simplifying x + -0.2336734694 = -0.395782903 Reorder the terms: -0.2336734694 + x = -0.395782903 Solving -0.2336734694 + x = -0.395782903 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2336734694' to each side of the equation. -0.2336734694 + 0.2336734694 + x = -0.395782903 + 0.2336734694 Combine like terms: -0.2336734694 + 0.2336734694 = 0.0000000000 0.0000000000 + x = -0.395782903 + 0.2336734694 x = -0.395782903 + 0.2336734694 Combine like terms: -0.395782903 + 0.2336734694 = -0.1621094336 x = -0.1621094336 Simplifying x = -0.1621094336

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.6294563724, -0.1621094336}

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