-4.9x^2=-3.6x-27

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Solution for -4.9x^2=-3.6x-27 equation:


Simplifying
-4.9x2 = -3.6x + -27

Reorder the terms:
-4.9x2 = -27 + -3.6x

Solving
-4.9x2 = -27 + -3.6x

Solving for variable 'x'.

Reorder the terms:
27 + 3.6x + -4.9x2 = -27 + -3.6x + 27 + 3.6x

Reorder the terms:
27 + 3.6x + -4.9x2 = -27 + 27 + -3.6x + 3.6x

Combine like terms: -27 + 27 = 0
27 + 3.6x + -4.9x2 = 0 + -3.6x + 3.6x
27 + 3.6x + -4.9x2 = -3.6x + 3.6x

Combine like terms: -3.6x + 3.6x = 0.0
27 + 3.6x + -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'.
-5.510204082 + -0.7346938776x + x2 = 0

Move the constant term to the right:

Add '5.510204082' to each side of the equation.
-5.510204082 + -0.7346938776x + 5.510204082 + x2 = 0 + 5.510204082

Reorder the terms:
-5.510204082 + 5.510204082 + -0.7346938776x + x2 = 0 + 5.510204082

Combine like terms: -5.510204082 + 5.510204082 = 0.000000000
0.000000000 + -0.7346938776x + x2 = 0 + 5.510204082
-0.7346938776x + x2 = 0 + 5.510204082

Combine like terms: 0 + 5.510204082 = 5.510204082
-0.7346938776x + x2 = 5.510204082

The x term is -0.7346938776x.  Take half its coefficient (-0.3673469388).
Square it (0.1349437734) and add it to both sides.

Add '0.1349437734' to each side of the equation.
-0.7346938776x + 0.1349437734 + x2 = 5.510204082 + 0.1349437734

Reorder the terms:
0.1349437734 + -0.7346938776x + x2 = 5.510204082 + 0.1349437734

Combine like terms: 5.510204082 + 0.1349437734 = 5.6451478554
0.1349437734 + -0.7346938776x + x2 = 5.6451478554

Factor a perfect square on the left side:
(x + -0.3673469388)(x + -0.3673469388) = 5.6451478554

Calculate the square root of the right side: 2.375951989

Break this problem into two subproblems by setting 
(x + -0.3673469388) equal to 2.375951989 and -2.375951989.

Subproblem 1

x + -0.3673469388 = 2.375951989 Simplifying x + -0.3673469388 = 2.375951989 Reorder the terms: -0.3673469388 + x = 2.375951989 Solving -0.3673469388 + x = 2.375951989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3673469388' to each side of the equation. -0.3673469388 + 0.3673469388 + x = 2.375951989 + 0.3673469388 Combine like terms: -0.3673469388 + 0.3673469388 = 0.0000000000 0.0000000000 + x = 2.375951989 + 0.3673469388 x = 2.375951989 + 0.3673469388 Combine like terms: 2.375951989 + 0.3673469388 = 2.7432989278 x = 2.7432989278 Simplifying x = 2.7432989278

Subproblem 2

x + -0.3673469388 = -2.375951989 Simplifying x + -0.3673469388 = -2.375951989 Reorder the terms: -0.3673469388 + x = -2.375951989 Solving -0.3673469388 + x = -2.375951989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3673469388' to each side of the equation. -0.3673469388 + 0.3673469388 + x = -2.375951989 + 0.3673469388 Combine like terms: -0.3673469388 + 0.3673469388 = 0.0000000000 0.0000000000 + x = -2.375951989 + 0.3673469388 x = -2.375951989 + 0.3673469388 Combine like terms: -2.375951989 + 0.3673469388 = -2.0086050502 x = -2.0086050502 Simplifying x = -2.0086050502

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.7432989278, -2.0086050502}

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