7x^2+19x-5=

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Solution for 7x^2+19x-5= equation:


Simplifying
7x2 + 19x + -5 = 0

Reorder the terms:
-5 + 19x + 7x2 = 0

Solving
-5 + 19x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
-0.7142857143 + 2.714285714x + x2 = 0

Move the constant term to the right:

Add '0.7142857143' to each side of the equation.
-0.7142857143 + 2.714285714x + 0.7142857143 + x2 = 0 + 0.7142857143

Reorder the terms:
-0.7142857143 + 0.7142857143 + 2.714285714x + x2 = 0 + 0.7142857143

Combine like terms: -0.7142857143 + 0.7142857143 = 0.0000000000
0.0000000000 + 2.714285714x + x2 = 0 + 0.7142857143
2.714285714x + x2 = 0 + 0.7142857143

Combine like terms: 0 + 0.7142857143 = 0.7142857143
2.714285714x + x2 = 0.7142857143

The x term is 2.714285714x.  Take half its coefficient (1.357142857).
Square it (1.841836734) and add it to both sides.

Add '1.841836734' to each side of the equation.
2.714285714x + 1.841836734 + x2 = 0.7142857143 + 1.841836734

Reorder the terms:
1.841836734 + 2.714285714x + x2 = 0.7142857143 + 1.841836734

Combine like terms: 0.7142857143 + 1.841836734 = 2.5561224483
1.841836734 + 2.714285714x + x2 = 2.5561224483

Factor a perfect square on the left side:
(x + 1.357142857)(x + 1.357142857) = 2.5561224483

Calculate the square root of the right side: 1.598787806

Break this problem into two subproblems by setting 
(x + 1.357142857) equal to 1.598787806 and -1.598787806.

Subproblem 1

x + 1.357142857 = 1.598787806 Simplifying x + 1.357142857 = 1.598787806 Reorder the terms: 1.357142857 + x = 1.598787806 Solving 1.357142857 + x = 1.598787806 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.357142857' to each side of the equation. 1.357142857 + -1.357142857 + x = 1.598787806 + -1.357142857 Combine like terms: 1.357142857 + -1.357142857 = 0.000000000 0.000000000 + x = 1.598787806 + -1.357142857 x = 1.598787806 + -1.357142857 Combine like terms: 1.598787806 + -1.357142857 = 0.241644949 x = 0.241644949 Simplifying x = 0.241644949

Subproblem 2

x + 1.357142857 = -1.598787806 Simplifying x + 1.357142857 = -1.598787806 Reorder the terms: 1.357142857 + x = -1.598787806 Solving 1.357142857 + x = -1.598787806 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.357142857' to each side of the equation. 1.357142857 + -1.357142857 + x = -1.598787806 + -1.357142857 Combine like terms: 1.357142857 + -1.357142857 = 0.000000000 0.000000000 + x = -1.598787806 + -1.357142857 x = -1.598787806 + -1.357142857 Combine like terms: -1.598787806 + -1.357142857 = -2.955930663 x = -2.955930663 Simplifying x = -2.955930663

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.241644949, -2.955930663}

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