0.25x^2+1.5x+2=0

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Solution for 0.25x^2+1.5x+2=0 equation:


Simplifying
0.25x2 + 1.5x + 2 = 0

Reorder the terms:
2 + 1.5x + 0.25x2 = 0

Solving
2 + 1.5x + 0.25x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.25'.
8 + 6x + x2 = 0

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + 6x + -8 + x2 = 0 + -8

Reorder the terms:
8 + -8 + 6x + x2 = 0 + -8

Combine like terms: 8 + -8 = 0
0 + 6x + x2 = 0 + -8
6x + x2 = 0 + -8

Combine like terms: 0 + -8 = -8
6x + x2 = -8

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = -8 + 9

Reorder the terms:
9 + 6x + x2 = -8 + 9

Combine like terms: -8 + 9 = 1
9 + 6x + x2 = 1

Factor a perfect square on the left side:
(x + 3)(x + 3) = 1

Calculate the square root of the right side: 1

Break this problem into two subproblems by setting 
(x + 3) equal to 1 and -1.

Subproblem 1

x + 3 = 1 Simplifying x + 3 = 1 Reorder the terms: 3 + x = 1 Solving 3 + x = 1 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 1 + -3 Combine like terms: 3 + -3 = 0 0 + x = 1 + -3 x = 1 + -3 Combine like terms: 1 + -3 = -2 x = -2 Simplifying x = -2

Subproblem 2

x + 3 = -1 Simplifying x + 3 = -1 Reorder the terms: 3 + x = -1 Solving 3 + x = -1 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -1 + -3 Combine like terms: 3 + -3 = 0 0 + x = -1 + -3 x = -1 + -3 Combine like terms: -1 + -3 = -4 x = -4 Simplifying x = -4

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2, -4}

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