3x^2+x-270=

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Solution for 3x^2+x-270= equation:


Simplifying
3x2 + x + -270 = 0

Reorder the terms:
-270 + x + 3x2 = 0

Solving
-270 + x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
-90 + 0.3333333333x + x2 = 0

Move the constant term to the right:

Add '90' to each side of the equation.
-90 + 0.3333333333x + 90 + x2 = 0 + 90

Reorder the terms:
-90 + 90 + 0.3333333333x + x2 = 0 + 90

Combine like terms: -90 + 90 = 0
0 + 0.3333333333x + x2 = 0 + 90
0.3333333333x + x2 = 0 + 90

Combine like terms: 0 + 90 = 90
0.3333333333x + x2 = 90

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.3333333333x + 0.25 + x2 = 90 + 0.25

Reorder the terms:
0.25 + 0.3333333333x + x2 = 90 + 0.25

Combine like terms: 90 + 0.25 = 90.25
0.25 + 0.3333333333x + x2 = 90.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 90.25

Calculate the square root of the right side: 9.5

Break this problem into two subproblems by setting 
(x + 0.5) equal to 9.5 and -9.5.

Subproblem 1

x + 0.5 = 9.5 Simplifying x + 0.5 = 9.5 Reorder the terms: 0.5 + x = 9.5 Solving 0.5 + x = 9.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 9.5 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 9.5 + -0.5 x = 9.5 + -0.5 Combine like terms: 9.5 + -0.5 = 9 x = 9 Simplifying x = 9

Subproblem 2

x + 0.5 = -9.5 Simplifying x + 0.5 = -9.5 Reorder the terms: 0.5 + x = -9.5 Solving 0.5 + x = -9.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -9.5 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -9.5 + -0.5 x = -9.5 + -0.5 Combine like terms: -9.5 + -0.5 = -10 x = -10 Simplifying x = -10

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9, -10}

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