16x^2+14x-15=10

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Solution for 16x^2+14x-15=10 equation:


Simplifying
16x2 + 14x + -15 = 10

Reorder the terms:
-15 + 14x + 16x2 = 10

Solving
-15 + 14x + 16x2 = 10

Solving for variable 'x'.

Reorder the terms:
-15 + -10 + 14x + 16x2 = 10 + -10

Combine like terms: -15 + -10 = -25
-25 + 14x + 16x2 = 10 + -10

Combine like terms: 10 + -10 = 0
-25 + 14x + 16x2 = 0

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

Divide each side by '16'.
-1.5625 + 0.875x + x2 = 0

Move the constant term to the right:

Add '1.5625' to each side of the equation.
-1.5625 + 0.875x + 1.5625 + x2 = 0 + 1.5625

Reorder the terms:
-1.5625 + 1.5625 + 0.875x + x2 = 0 + 1.5625

Combine like terms: -1.5625 + 1.5625 = 0.0000
0.0000 + 0.875x + x2 = 0 + 1.5625
0.875x + x2 = 0 + 1.5625

Combine like terms: 0 + 1.5625 = 1.5625
0.875x + x2 = 1.5625

The x term is 0.875x.  Take half its coefficient (0.4375).
Square it (0.19140625) and add it to both sides.

Add '0.19140625' to each side of the equation.
0.875x + 0.19140625 + x2 = 1.5625 + 0.19140625

Reorder the terms:
0.19140625 + 0.875x + x2 = 1.5625 + 0.19140625

Combine like terms: 1.5625 + 0.19140625 = 1.75390625
0.19140625 + 0.875x + x2 = 1.75390625

Factor a perfect square on the left side:
(x + 0.4375)(x + 0.4375) = 1.75390625

Calculate the square root of the right side: 1.324351256

Break this problem into two subproblems by setting 
(x + 0.4375) equal to 1.324351256 and -1.324351256.

Subproblem 1

x + 0.4375 = 1.324351256 Simplifying x + 0.4375 = 1.324351256 Reorder the terms: 0.4375 + x = 1.324351256 Solving 0.4375 + x = 1.324351256 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4375' to each side of the equation. 0.4375 + -0.4375 + x = 1.324351256 + -0.4375 Combine like terms: 0.4375 + -0.4375 = 0.0000 0.0000 + x = 1.324351256 + -0.4375 x = 1.324351256 + -0.4375 Combine like terms: 1.324351256 + -0.4375 = 0.886851256 x = 0.886851256 Simplifying x = 0.886851256

Subproblem 2

x + 0.4375 = -1.324351256 Simplifying x + 0.4375 = -1.324351256 Reorder the terms: 0.4375 + x = -1.324351256 Solving 0.4375 + x = -1.324351256 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4375' to each side of the equation. 0.4375 + -0.4375 + x = -1.324351256 + -0.4375 Combine like terms: 0.4375 + -0.4375 = 0.0000 0.0000 + x = -1.324351256 + -0.4375 x = -1.324351256 + -0.4375 Combine like terms: -1.324351256 + -0.4375 = -1.761851256 x = -1.761851256 Simplifying x = -1.761851256

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.886851256, -1.761851256}

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