7.6x+2.75x^2=-1.76

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Solution for 7.6x+2.75x^2=-1.76 equation:


Simplifying
7.6x + 2.75x2 = -1.76

Solving
7.6x + 2.75x2 = -1.76

Solving for variable 'x'.

Reorder the terms:
1.76 + 7.6x + 2.75x2 = -1.76 + 1.76

Combine like terms: -1.76 + 1.76 = 0.00
1.76 + 7.6x + 2.75x2 = 0.00

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

Divide each side by '2.75'.
0.64 + 2.763636364x + x2 = 0

Move the constant term to the right:

Add '-0.64' to each side of the equation.
0.64 + 2.763636364x + -0.64 + x2 = 0 + -0.64

Reorder the terms:
0.64 + -0.64 + 2.763636364x + x2 = 0 + -0.64

Combine like terms: 0.64 + -0.64 = 0.00
0.00 + 2.763636364x + x2 = 0 + -0.64
2.763636364x + x2 = 0 + -0.64

Combine like terms: 0 + -0.64 = -0.64
2.763636364x + x2 = -0.64

The x term is 2.763636364x.  Take half its coefficient (1.381818182).
Square it (1.909421488) and add it to both sides.

Add '1.909421488' to each side of the equation.
2.763636364x + 1.909421488 + x2 = -0.64 + 1.909421488

Reorder the terms:
1.909421488 + 2.763636364x + x2 = -0.64 + 1.909421488

Combine like terms: -0.64 + 1.909421488 = 1.269421488
1.909421488 + 2.763636364x + x2 = 1.269421488

Factor a perfect square on the left side:
(x + 1.381818182)(x + 1.381818182) = 1.269421488

Calculate the square root of the right side: 1.126686065

Break this problem into two subproblems by setting 
(x + 1.381818182) equal to 1.126686065 and -1.126686065.

Subproblem 1

x + 1.381818182 = 1.126686065 Simplifying x + 1.381818182 = 1.126686065 Reorder the terms: 1.381818182 + x = 1.126686065 Solving 1.381818182 + x = 1.126686065 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.381818182' to each side of the equation. 1.381818182 + -1.381818182 + x = 1.126686065 + -1.381818182 Combine like terms: 1.381818182 + -1.381818182 = 0.000000000 0.000000000 + x = 1.126686065 + -1.381818182 x = 1.126686065 + -1.381818182 Combine like terms: 1.126686065 + -1.381818182 = -0.255132117 x = -0.255132117 Simplifying x = -0.255132117

Subproblem 2

x + 1.381818182 = -1.126686065 Simplifying x + 1.381818182 = -1.126686065 Reorder the terms: 1.381818182 + x = -1.126686065 Solving 1.381818182 + x = -1.126686065 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.381818182' to each side of the equation. 1.381818182 + -1.381818182 + x = -1.126686065 + -1.381818182 Combine like terms: 1.381818182 + -1.381818182 = 0.000000000 0.000000000 + x = -1.126686065 + -1.381818182 x = -1.126686065 + -1.381818182 Combine like terms: -1.126686065 + -1.381818182 = -2.508504247 x = -2.508504247 Simplifying x = -2.508504247

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.255132117, -2.508504247}

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