-4.9x^2+16x+1.5=0

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Solution for -4.9x^2+16x+1.5=0 equation:


Simplifying
-4.9x2 + 16x + 1.5 = 0

Reorder the terms:
1.5 + 16x + -4.9x2 = 0

Solving
1.5 + 16x + -4.9x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-4.9 the coefficient of the squared term: 

Divide each side by '-4.9'.
-0.306122449 + -3.265306122x + x2 = 0

Move the constant term to the right:

Add '0.306122449' to each side of the equation.
-0.306122449 + -3.265306122x + 0.306122449 + x2 = 0 + 0.306122449

Reorder the terms:
-0.306122449 + 0.306122449 + -3.265306122x + x2 = 0 + 0.306122449

Combine like terms: -0.306122449 + 0.306122449 = 0.000000000
0.000000000 + -3.265306122x + x2 = 0 + 0.306122449
-3.265306122x + x2 = 0 + 0.306122449

Combine like terms: 0 + 0.306122449 = 0.306122449
-3.265306122x + x2 = 0.306122449

The x term is -3.265306122x.  Take half its coefficient (-1.632653061).
Square it (2.665556018) and add it to both sides.

Add '2.665556018' to each side of the equation.
-3.265306122x + 2.665556018 + x2 = 0.306122449 + 2.665556018

Reorder the terms:
2.665556018 + -3.265306122x + x2 = 0.306122449 + 2.665556018

Combine like terms: 0.306122449 + 2.665556018 = 2.971678467
2.665556018 + -3.265306122x + x2 = 2.971678467

Factor a perfect square on the left side:
(x + -1.632653061)(x + -1.632653061) = 2.971678467

Calculate the square root of the right side: 1.723855698

Break this problem into two subproblems by setting 
(x + -1.632653061) equal to 1.723855698 and -1.723855698.

Subproblem 1

x + -1.632653061 = 1.723855698 Simplifying x + -1.632653061 = 1.723855698 Reorder the terms: -1.632653061 + x = 1.723855698 Solving -1.632653061 + x = 1.723855698 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.632653061' to each side of the equation. -1.632653061 + 1.632653061 + x = 1.723855698 + 1.632653061 Combine like terms: -1.632653061 + 1.632653061 = 0.000000000 0.000000000 + x = 1.723855698 + 1.632653061 x = 1.723855698 + 1.632653061 Combine like terms: 1.723855698 + 1.632653061 = 3.356508759 x = 3.356508759 Simplifying x = 3.356508759

Subproblem 2

x + -1.632653061 = -1.723855698 Simplifying x + -1.632653061 = -1.723855698 Reorder the terms: -1.632653061 + x = -1.723855698 Solving -1.632653061 + x = -1.723855698 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.632653061' to each side of the equation. -1.632653061 + 1.632653061 + x = -1.723855698 + 1.632653061 Combine like terms: -1.632653061 + 1.632653061 = 0.000000000 0.000000000 + x = -1.723855698 + 1.632653061 x = -1.723855698 + 1.632653061 Combine like terms: -1.723855698 + 1.632653061 = -0.091202637 x = -0.091202637 Simplifying x = -0.091202637

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.356508759, -0.091202637}

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