0=-16x^2+90x-95

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Solution for 0=-16x^2+90x-95 equation:


Simplifying
0 = -16x2 + 90x + -95

Reorder the terms:
0 = -95 + 90x + -16x2

Solving
0 = -95 + 90x + -16x2

Solving for variable 'x'.

Combine like terms: 0 + 95 = 95
95 + -90x + 16x2 = -95 + 90x + -16x2 + 95 + -90x + 16x2

Reorder the terms:
95 + -90x + 16x2 = -95 + 95 + 90x + -90x + -16x2 + 16x2

Combine like terms: -95 + 95 = 0
95 + -90x + 16x2 = 0 + 90x + -90x + -16x2 + 16x2
95 + -90x + 16x2 = 90x + -90x + -16x2 + 16x2

Combine like terms: 90x + -90x = 0
95 + -90x + 16x2 = 0 + -16x2 + 16x2
95 + -90x + 16x2 = -16x2 + 16x2

Combine like terms: -16x2 + 16x2 = 0
95 + -90x + 16x2 = 0

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

Divide each side by '16'.
5.9375 + -5.625x + x2 = 0

Move the constant term to the right:

Add '-5.9375' to each side of the equation.
5.9375 + -5.625x + -5.9375 + x2 = 0 + -5.9375

Reorder the terms:
5.9375 + -5.9375 + -5.625x + x2 = 0 + -5.9375

Combine like terms: 5.9375 + -5.9375 = 0.0000
0.0000 + -5.625x + x2 = 0 + -5.9375
-5.625x + x2 = 0 + -5.9375

Combine like terms: 0 + -5.9375 = -5.9375
-5.625x + x2 = -5.9375

The x term is -5.625x.  Take half its coefficient (-2.8125).
Square it (7.91015625) and add it to both sides.

Add '7.91015625' to each side of the equation.
-5.625x + 7.91015625 + x2 = -5.9375 + 7.91015625

Reorder the terms:
7.91015625 + -5.625x + x2 = -5.9375 + 7.91015625

Combine like terms: -5.9375 + 7.91015625 = 1.97265625
7.91015625 + -5.625x + x2 = 1.97265625

Factor a perfect square on the left side:
(x + -2.8125)(x + -2.8125) = 1.97265625

Calculate the square root of the right side: 1.404512816

Break this problem into two subproblems by setting 
(x + -2.8125) equal to 1.404512816 and -1.404512816.

Subproblem 1

x + -2.8125 = 1.404512816 Simplifying x + -2.8125 = 1.404512816 Reorder the terms: -2.8125 + x = 1.404512816 Solving -2.8125 + x = 1.404512816 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.8125' to each side of the equation. -2.8125 + 2.8125 + x = 1.404512816 + 2.8125 Combine like terms: -2.8125 + 2.8125 = 0.0000 0.0000 + x = 1.404512816 + 2.8125 x = 1.404512816 + 2.8125 Combine like terms: 1.404512816 + 2.8125 = 4.217012816 x = 4.217012816 Simplifying x = 4.217012816

Subproblem 2

x + -2.8125 = -1.404512816 Simplifying x + -2.8125 = -1.404512816 Reorder the terms: -2.8125 + x = -1.404512816 Solving -2.8125 + x = -1.404512816 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.8125' to each side of the equation. -2.8125 + 2.8125 + x = -1.404512816 + 2.8125 Combine like terms: -2.8125 + 2.8125 = 0.0000 0.0000 + x = -1.404512816 + 2.8125 x = -1.404512816 + 2.8125 Combine like terms: -1.404512816 + 2.8125 = 1.407987184 x = 1.407987184 Simplifying x = 1.407987184

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.217012816, 1.407987184}

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