0.25x^2-1.5x=10

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Solution for 0.25x^2-1.5x=10 equation:


Simplifying
0.25x2 + -1.5x = 10

Reorder the terms:
-1.5x + 0.25x2 = 10

Solving
-1.5x + 0.25x2 = 10

Solving for variable 'x'.

Reorder the terms:
-10 + -1.5x + 0.25x2 = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + -1.5x + 0.25x2 = 0

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

Divide each side by '0.25'.
-40 + -6x + x2 = 0

Move the constant term to the right:

Add '40' to each side of the equation.
-40 + -6x + 40 + x2 = 0 + 40

Reorder the terms:
-40 + 40 + -6x + x2 = 0 + 40

Combine like terms: -40 + 40 = 0
0 + -6x + x2 = 0 + 40
-6x + x2 = 0 + 40

Combine like terms: 0 + 40 = 40
-6x + x2 = 40

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 = 40 + 9

Reorder the terms:
9 + -6x + x2 = 40 + 9

Combine like terms: 40 + 9 = 49
9 + -6x + x2 = 49

Factor a perfect square on the left side:
(x + -3)(x + -3) = 49

Calculate the square root of the right side: 7

Break this problem into two subproblems by setting 
(x + -3) equal to 7 and -7.

Subproblem 1

x + -3 = 7 Simplifying x + -3 = 7 Reorder the terms: -3 + x = 7 Solving -3 + x = 7 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 = 7 + 3 Combine like terms: -3 + 3 = 0 0 + x = 7 + 3 x = 7 + 3 Combine like terms: 7 + 3 = 10 x = 10 Simplifying x = 10

Subproblem 2

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

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10, -4}

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