.25x^2-1.5x-1.75=0

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Solution for .25x^2-1.5x-1.75=0 equation:


Simplifying
0.25x2 + -1.5x + -1.75 = 0

Reorder the terms:
-1.75 + -1.5x + 0.25x2 = 0

Solving
-1.75 + -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'.
-7 + -6x + x2 = 0

Move the constant term to the right:

Add '7' to each side of the equation.
-7 + -6x + 7 + x2 = 0 + 7

Reorder the terms:
-7 + 7 + -6x + x2 = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -6x + x2 = 0 + 7
-6x + x2 = 0 + 7

Combine like terms: 0 + 7 = 7
-6x + x2 = 7

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 = 7 + 9

Reorder the terms:
9 + -6x + x2 = 7 + 9

Combine like terms: 7 + 9 = 16
9 + -6x + x2 = 16

Factor a perfect square on the left side:
(x + -3)(x + -3) = 16

Calculate the square root of the right side: 4

Break this problem into two subproblems by setting 
(x + -3) equal to 4 and -4.

Subproblem 1

x + -3 = 4 Simplifying x + -3 = 4 Reorder the terms: -3 + x = 4 Solving -3 + x = 4 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 = 4 + 3 Combine like terms: -3 + 3 = 0 0 + x = 4 + 3 x = 4 + 3 Combine like terms: 4 + 3 = 7 x = 7 Simplifying x = 7

Subproblem 2

x + -3 = -4 Simplifying x + -3 = -4 Reorder the terms: -3 + x = -4 Solving -3 + x = -4 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 = -4 + 3 Combine like terms: -3 + 3 = 0 0 + x = -4 + 3 x = -4 + 3 Combine like terms: -4 + 3 = -1 x = -1 Simplifying x = -1

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7, -1}

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