-16x^2+4.51x+32.81=0

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Solution for -16x^2+4.51x+32.81=0 equation:


Simplifying
-16x2 + 4.51x + 32.81 = 0

Reorder the terms:
32.81 + 4.51x + -16x2 = 0

Solving
32.81 + 4.51x + -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'.
-2.050625 + -0.281875x + x2 = 0

Move the constant term to the right:

Add '2.050625' to each side of the equation.
-2.050625 + -0.281875x + 2.050625 + x2 = 0 + 2.050625

Reorder the terms:
-2.050625 + 2.050625 + -0.281875x + x2 = 0 + 2.050625

Combine like terms: -2.050625 + 2.050625 = 0.000000
0.000000 + -0.281875x + x2 = 0 + 2.050625
-0.281875x + x2 = 0 + 2.050625

Combine like terms: 0 + 2.050625 = 2.050625
-0.281875x + x2 = 2.050625

The x term is -0.281875x.  Take half its coefficient (-0.1409375).
Square it (0.01986337891) and add it to both sides.

Add '0.01986337891' to each side of the equation.
-0.281875x + 0.01986337891 + x2 = 2.050625 + 0.01986337891

Reorder the terms:
0.01986337891 + -0.281875x + x2 = 2.050625 + 0.01986337891

Combine like terms: 2.050625 + 0.01986337891 = 2.07048837891
0.01986337891 + -0.281875x + x2 = 2.07048837891

Factor a perfect square on the left side:
(x + -0.1409375)(x + -0.1409375) = 2.07048837891

Calculate the square root of the right side: 1.43891917

Break this problem into two subproblems by setting 
(x + -0.1409375) equal to 1.43891917 and -1.43891917.

Subproblem 1

x + -0.1409375 = 1.43891917 Simplifying x + -0.1409375 = 1.43891917 Reorder the terms: -0.1409375 + x = 1.43891917 Solving -0.1409375 + x = 1.43891917 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1409375' to each side of the equation. -0.1409375 + 0.1409375 + x = 1.43891917 + 0.1409375 Combine like terms: -0.1409375 + 0.1409375 = 0.0000000 0.0000000 + x = 1.43891917 + 0.1409375 x = 1.43891917 + 0.1409375 Combine like terms: 1.43891917 + 0.1409375 = 1.57985667 x = 1.57985667 Simplifying x = 1.57985667

Subproblem 2

x + -0.1409375 = -1.43891917 Simplifying x + -0.1409375 = -1.43891917 Reorder the terms: -0.1409375 + x = -1.43891917 Solving -0.1409375 + x = -1.43891917 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1409375' to each side of the equation. -0.1409375 + 0.1409375 + x = -1.43891917 + 0.1409375 Combine like terms: -0.1409375 + 0.1409375 = 0.0000000 0.0000000 + x = -1.43891917 + 0.1409375 x = -1.43891917 + 0.1409375 Combine like terms: -1.43891917 + 0.1409375 = -1.29798167 x = -1.29798167 Simplifying x = -1.29798167

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.57985667, -1.29798167}

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