16x^2-45x+7=0

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Solution for 16x^2-45x+7=0 equation:


Simplifying
16x2 + -45x + 7 = 0

Reorder the terms:
7 + -45x + 16x2 = 0

Solving
7 + -45x + 16x2 = 0

Solving for variable 'x'.

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

Divide each side by '16'.
0.4375 + -2.8125x + x2 = 0

Move the constant term to the right:

Add '-0.4375' to each side of the equation.
0.4375 + -2.8125x + -0.4375 + x2 = 0 + -0.4375

Reorder the terms:
0.4375 + -0.4375 + -2.8125x + x2 = 0 + -0.4375

Combine like terms: 0.4375 + -0.4375 = 0.0000
0.0000 + -2.8125x + x2 = 0 + -0.4375
-2.8125x + x2 = 0 + -0.4375

Combine like terms: 0 + -0.4375 = -0.4375
-2.8125x + x2 = -0.4375

The x term is -2.8125x.  Take half its coefficient (-1.40625).
Square it (1.977539063) and add it to both sides.

Add '1.977539063' to each side of the equation.
-2.8125x + 1.977539063 + x2 = -0.4375 + 1.977539063

Reorder the terms:
1.977539063 + -2.8125x + x2 = -0.4375 + 1.977539063

Combine like terms: -0.4375 + 1.977539063 = 1.540039063
1.977539063 + -2.8125x + x2 = 1.540039063

Factor a perfect square on the left side:
(x + -1.40625)(x + -1.40625) = 1.540039063

Calculate the square root of the right side: 1.240983103

Break this problem into two subproblems by setting 
(x + -1.40625) equal to 1.240983103 and -1.240983103.

Subproblem 1

x + -1.40625 = 1.240983103 Simplifying x + -1.40625 = 1.240983103 Reorder the terms: -1.40625 + x = 1.240983103 Solving -1.40625 + x = 1.240983103 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.40625' to each side of the equation. -1.40625 + 1.40625 + x = 1.240983103 + 1.40625 Combine like terms: -1.40625 + 1.40625 = 0.00000 0.00000 + x = 1.240983103 + 1.40625 x = 1.240983103 + 1.40625 Combine like terms: 1.240983103 + 1.40625 = 2.647233103 x = 2.647233103 Simplifying x = 2.647233103

Subproblem 2

x + -1.40625 = -1.240983103 Simplifying x + -1.40625 = -1.240983103 Reorder the terms: -1.40625 + x = -1.240983103 Solving -1.40625 + x = -1.240983103 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.40625' to each side of the equation. -1.40625 + 1.40625 + x = -1.240983103 + 1.40625 Combine like terms: -1.40625 + 1.40625 = 0.00000 0.00000 + x = -1.240983103 + 1.40625 x = -1.240983103 + 1.40625 Combine like terms: -1.240983103 + 1.40625 = 0.165266897 x = 0.165266897 Simplifying x = 0.165266897

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.647233103, 0.165266897}

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