-5=-4.9x^2+22x

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Solution for -5=-4.9x^2+22x equation:


Simplifying
-5 = -4.9x2 + 22x

Reorder the terms:
-5 = 22x + -4.9x2

Solving
-5 = 22x + -4.9x2

Solving for variable 'x'.

Reorder the terms:
-5 + -22x + 4.9x2 = 22x + -22x + -4.9x2 + 4.9x2

Combine like terms: 22x + -22x = 0
-5 + -22x + 4.9x2 = 0 + -4.9x2 + 4.9x2
-5 + -22x + 4.9x2 = -4.9x2 + 4.9x2

Combine like terms: -4.9x2 + 4.9x2 = 0.0
-5 + -22x + 4.9x2 = 0.0

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

Divide each side by '4.9'.
-1.020408163 + -4.489795918x + x2 = 0

Move the constant term to the right:

Add '1.020408163' to each side of the equation.
-1.020408163 + -4.489795918x + 1.020408163 + x2 = 0 + 1.020408163

Reorder the terms:
-1.020408163 + 1.020408163 + -4.489795918x + x2 = 0 + 1.020408163

Combine like terms: -1.020408163 + 1.020408163 = 0.000000000
0.000000000 + -4.489795918x + x2 = 0 + 1.020408163
-4.489795918x + x2 = 0 + 1.020408163

Combine like terms: 0 + 1.020408163 = 1.020408163
-4.489795918x + x2 = 1.020408163

The x term is -4.489795918x.  Take half its coefficient (-2.244897959).
Square it (5.039566846) and add it to both sides.

Add '5.039566846' to each side of the equation.
-4.489795918x + 5.039566846 + x2 = 1.020408163 + 5.039566846

Reorder the terms:
5.039566846 + -4.489795918x + x2 = 1.020408163 + 5.039566846

Combine like terms: 1.020408163 + 5.039566846 = 6.059975009
5.039566846 + -4.489795918x + x2 = 6.059975009

Factor a perfect square on the left side:
(x + -2.244897959)(x + -2.244897959) = 6.059975009

Calculate the square root of the right side: 2.461701649

Break this problem into two subproblems by setting 
(x + -2.244897959) equal to 2.461701649 and -2.461701649.

Subproblem 1

x + -2.244897959 = 2.461701649 Simplifying x + -2.244897959 = 2.461701649 Reorder the terms: -2.244897959 + x = 2.461701649 Solving -2.244897959 + x = 2.461701649 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.244897959' to each side of the equation. -2.244897959 + 2.244897959 + x = 2.461701649 + 2.244897959 Combine like terms: -2.244897959 + 2.244897959 = 0.000000000 0.000000000 + x = 2.461701649 + 2.244897959 x = 2.461701649 + 2.244897959 Combine like terms: 2.461701649 + 2.244897959 = 4.706599608 x = 4.706599608 Simplifying x = 4.706599608

Subproblem 2

x + -2.244897959 = -2.461701649 Simplifying x + -2.244897959 = -2.461701649 Reorder the terms: -2.244897959 + x = -2.461701649 Solving -2.244897959 + x = -2.461701649 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.244897959' to each side of the equation. -2.244897959 + 2.244897959 + x = -2.461701649 + 2.244897959 Combine like terms: -2.244897959 + 2.244897959 = 0.000000000 0.000000000 + x = -2.461701649 + 2.244897959 x = -2.461701649 + 2.244897959 Combine like terms: -2.461701649 + 2.244897959 = -0.21680369 x = -0.21680369 Simplifying x = -0.21680369

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.706599608, -0.21680369}

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