16x^2+75x=28

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Solution for 16x^2+75x=28 equation:


Simplifying
16x2 + 75x = 28

Reorder the terms:
75x + 16x2 = 28

Solving
75x + 16x2 = 28

Solving for variable 'x'.

Reorder the terms:
-28 + 75x + 16x2 = 28 + -28

Combine like terms: 28 + -28 = 0
-28 + 75x + 16x2 = 0

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

Divide each side by '16'.
-1.75 + 4.6875x + x2 = 0

Move the constant term to the right:

Add '1.75' to each side of the equation.
-1.75 + 4.6875x + 1.75 + x2 = 0 + 1.75

Reorder the terms:
-1.75 + 1.75 + 4.6875x + x2 = 0 + 1.75

Combine like terms: -1.75 + 1.75 = 0.00
0.00 + 4.6875x + x2 = 0 + 1.75
4.6875x + x2 = 0 + 1.75

Combine like terms: 0 + 1.75 = 1.75
4.6875x + x2 = 1.75

The x term is 4.6875x.  Take half its coefficient (2.34375).
Square it (5.493164063) and add it to both sides.

Add '5.493164063' to each side of the equation.
4.6875x + 5.493164063 + x2 = 1.75 + 5.493164063

Reorder the terms:
5.493164063 + 4.6875x + x2 = 1.75 + 5.493164063

Combine like terms: 1.75 + 5.493164063 = 7.243164063
5.493164063 + 4.6875x + x2 = 7.243164063

Factor a perfect square on the left side:
(x + 2.34375)(x + 2.34375) = 7.243164063

Calculate the square root of the right side: 2.691312703

Break this problem into two subproblems by setting 
(x + 2.34375) equal to 2.691312703 and -2.691312703.

Subproblem 1

x + 2.34375 = 2.691312703 Simplifying x + 2.34375 = 2.691312703 Reorder the terms: 2.34375 + x = 2.691312703 Solving 2.34375 + x = 2.691312703 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.34375' to each side of the equation. 2.34375 + -2.34375 + x = 2.691312703 + -2.34375 Combine like terms: 2.34375 + -2.34375 = 0.00000 0.00000 + x = 2.691312703 + -2.34375 x = 2.691312703 + -2.34375 Combine like terms: 2.691312703 + -2.34375 = 0.347562703 x = 0.347562703 Simplifying x = 0.347562703

Subproblem 2

x + 2.34375 = -2.691312703 Simplifying x + 2.34375 = -2.691312703 Reorder the terms: 2.34375 + x = -2.691312703 Solving 2.34375 + x = -2.691312703 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.34375' to each side of the equation. 2.34375 + -2.34375 + x = -2.691312703 + -2.34375 Combine like terms: 2.34375 + -2.34375 = 0.00000 0.00000 + x = -2.691312703 + -2.34375 x = -2.691312703 + -2.34375 Combine like terms: -2.691312703 + -2.34375 = -5.035062703 x = -5.035062703 Simplifying x = -5.035062703

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.347562703, -5.035062703}

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