-16x^2+70x+3=0

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Solution for -16x^2+70x+3=0 equation:


Simplifying
-16x2 + 70x + 3 = 0

Reorder the terms:
3 + 70x + -16x2 = 0

Solving
3 + 70x + -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'.
-0.1875 + -4.375x + x2 = 0

Move the constant term to the right:

Add '0.1875' to each side of the equation.
-0.1875 + -4.375x + 0.1875 + x2 = 0 + 0.1875

Reorder the terms:
-0.1875 + 0.1875 + -4.375x + x2 = 0 + 0.1875

Combine like terms: -0.1875 + 0.1875 = 0.0000
0.0000 + -4.375x + x2 = 0 + 0.1875
-4.375x + x2 = 0 + 0.1875

Combine like terms: 0 + 0.1875 = 0.1875
-4.375x + x2 = 0.1875

The x term is -4.375x.  Take half its coefficient (-2.1875).
Square it (4.78515625) and add it to both sides.

Add '4.78515625' to each side of the equation.
-4.375x + 4.78515625 + x2 = 0.1875 + 4.78515625

Reorder the terms:
4.78515625 + -4.375x + x2 = 0.1875 + 4.78515625

Combine like terms: 0.1875 + 4.78515625 = 4.97265625
4.78515625 + -4.375x + x2 = 4.97265625

Factor a perfect square on the left side:
(x + -2.1875)(x + -2.1875) = 4.97265625

Calculate the square root of the right side: 2.229945347

Break this problem into two subproblems by setting 
(x + -2.1875) equal to 2.229945347 and -2.229945347.

Subproblem 1

x + -2.1875 = 2.229945347 Simplifying x + -2.1875 = 2.229945347 Reorder the terms: -2.1875 + x = 2.229945347 Solving -2.1875 + x = 2.229945347 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.1875' to each side of the equation. -2.1875 + 2.1875 + x = 2.229945347 + 2.1875 Combine like terms: -2.1875 + 2.1875 = 0.0000 0.0000 + x = 2.229945347 + 2.1875 x = 2.229945347 + 2.1875 Combine like terms: 2.229945347 + 2.1875 = 4.417445347 x = 4.417445347 Simplifying x = 4.417445347

Subproblem 2

x + -2.1875 = -2.229945347 Simplifying x + -2.1875 = -2.229945347 Reorder the terms: -2.1875 + x = -2.229945347 Solving -2.1875 + x = -2.229945347 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.1875' to each side of the equation. -2.1875 + 2.1875 + x = -2.229945347 + 2.1875 Combine like terms: -2.1875 + 2.1875 = 0.0000 0.0000 + x = -2.229945347 + 2.1875 x = -2.229945347 + 2.1875 Combine like terms: -2.229945347 + 2.1875 = -0.042445347 x = -0.042445347 Simplifying x = -0.042445347

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.417445347, -0.042445347}

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