-4.9x^2+38x-25=0

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Solution for -4.9x^2+38x-25=0 equation:


Simplifying
-4.9x2 + 38x + -25 = 0

Reorder the terms:
-25 + 38x + -4.9x2 = 0

Solving
-25 + 38x + -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'.
5.102040816 + -7.755102041x + x2 = 0

Move the constant term to the right:

Add '-5.102040816' to each side of the equation.
5.102040816 + -7.755102041x + -5.102040816 + x2 = 0 + -5.102040816

Reorder the terms:
5.102040816 + -5.102040816 + -7.755102041x + x2 = 0 + -5.102040816

Combine like terms: 5.102040816 + -5.102040816 = 0.000000000
0.000000000 + -7.755102041x + x2 = 0 + -5.102040816
-7.755102041x + x2 = 0 + -5.102040816

Combine like terms: 0 + -5.102040816 = -5.102040816
-7.755102041x + x2 = -5.102040816

The x term is -7.755102041x.  Take half its coefficient (-3.877551021).
Square it (15.03540192) and add it to both sides.

Add '15.03540192' to each side of the equation.
-7.755102041x + 15.03540192 + x2 = -5.102040816 + 15.03540192

Reorder the terms:
15.03540192 + -7.755102041x + x2 = -5.102040816 + 15.03540192

Combine like terms: -5.102040816 + 15.03540192 = 9.933361104
15.03540192 + -7.755102041x + x2 = 9.933361104

Factor a perfect square on the left side:
(x + -3.877551021)(x + -3.877551021) = 9.933361104

Calculate the square root of the right side: 3.151723513

Break this problem into two subproblems by setting 
(x + -3.877551021) equal to 3.151723513 and -3.151723513.

Subproblem 1

x + -3.877551021 = 3.151723513 Simplifying x + -3.877551021 = 3.151723513 Reorder the terms: -3.877551021 + x = 3.151723513 Solving -3.877551021 + x = 3.151723513 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.877551021' to each side of the equation. -3.877551021 + 3.877551021 + x = 3.151723513 + 3.877551021 Combine like terms: -3.877551021 + 3.877551021 = 0.000000000 0.000000000 + x = 3.151723513 + 3.877551021 x = 3.151723513 + 3.877551021 Combine like terms: 3.151723513 + 3.877551021 = 7.029274534 x = 7.029274534 Simplifying x = 7.029274534

Subproblem 2

x + -3.877551021 = -3.151723513 Simplifying x + -3.877551021 = -3.151723513 Reorder the terms: -3.877551021 + x = -3.151723513 Solving -3.877551021 + x = -3.151723513 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.877551021' to each side of the equation. -3.877551021 + 3.877551021 + x = -3.151723513 + 3.877551021 Combine like terms: -3.877551021 + 3.877551021 = 0.000000000 0.000000000 + x = -3.151723513 + 3.877551021 x = -3.151723513 + 3.877551021 Combine like terms: -3.151723513 + 3.877551021 = 0.725827508 x = 0.725827508 Simplifying x = 0.725827508

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.029274534, 0.725827508}

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