7.54x+2x^2=100

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Solution for 7.54x+2x^2=100 equation:


Simplifying
7.54x + 2x2 = 100

Solving
7.54x + 2x2 = 100

Solving for variable 'x'.

Reorder the terms:
-100 + 7.54x + 2x2 = 100 + -100

Combine like terms: 100 + -100 = 0
-100 + 7.54x + 2x2 = 0

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

Divide each side by '2'.
-50 + 3.77x + x2 = 0

Move the constant term to the right:

Add '50' to each side of the equation.
-50 + 3.77x + 50 + x2 = 0 + 50

Reorder the terms:
-50 + 50 + 3.77x + x2 = 0 + 50

Combine like terms: -50 + 50 = 0
0 + 3.77x + x2 = 0 + 50
3.77x + x2 = 0 + 50

Combine like terms: 0 + 50 = 50
3.77x + x2 = 50

The x term is 3.77x.  Take half its coefficient (1.885).
Square it (3.553225) and add it to both sides.

Add '3.553225' to each side of the equation.
3.77x + 3.553225 + x2 = 50 + 3.553225

Reorder the terms:
3.553225 + 3.77x + x2 = 50 + 3.553225

Combine like terms: 50 + 3.553225 = 53.553225
3.553225 + 3.77x + x2 = 53.553225

Factor a perfect square on the left side:
(x + 1.885)(x + 1.885) = 53.553225

Calculate the square root of the right side: 7.318006901

Break this problem into two subproblems by setting 
(x + 1.885) equal to 7.318006901 and -7.318006901.

Subproblem 1

x + 1.885 = 7.318006901 Simplifying x + 1.885 = 7.318006901 Reorder the terms: 1.885 + x = 7.318006901 Solving 1.885 + x = 7.318006901 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.885' to each side of the equation. 1.885 + -1.885 + x = 7.318006901 + -1.885 Combine like terms: 1.885 + -1.885 = 0.000 0.000 + x = 7.318006901 + -1.885 x = 7.318006901 + -1.885 Combine like terms: 7.318006901 + -1.885 = 5.433006901 x = 5.433006901 Simplifying x = 5.433006901

Subproblem 2

x + 1.885 = -7.318006901 Simplifying x + 1.885 = -7.318006901 Reorder the terms: 1.885 + x = -7.318006901 Solving 1.885 + x = -7.318006901 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.885' to each side of the equation. 1.885 + -1.885 + x = -7.318006901 + -1.885 Combine like terms: 1.885 + -1.885 = 0.000 0.000 + x = -7.318006901 + -1.885 x = -7.318006901 + -1.885 Combine like terms: -7.318006901 + -1.885 = -9.203006901 x = -9.203006901 Simplifying x = -9.203006901

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.433006901, -9.203006901}

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