x^2-1.5x-10=0

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Solution for x^2-1.5x-10=0 equation:


Simplifying
x2 + -1.5x + -10 = 0

Reorder the terms:
-10 + -1.5x + x2 = 0

Solving
-10 + -1.5x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -1.5x + 10 + x2 = 0 + 10

Reorder the terms:
-10 + 10 + -1.5x + x2 = 0 + 10

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

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

The x term is -1.5x.  Take half its coefficient (-0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
-1.5x + 0.5625 + x2 = 10 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = 10 + 0.5625

Combine like terms: 10 + 0.5625 = 10.5625
0.5625 + -1.5x + x2 = 10.5625

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = 10.5625

Calculate the square root of the right side: 3.25

Break this problem into two subproblems by setting 
(x + -0.75) equal to 3.25 and -3.25.

Subproblem 1

x + -0.75 = 3.25 Simplifying x + -0.75 = 3.25 Reorder the terms: -0.75 + x = 3.25 Solving -0.75 + x = 3.25 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = 3.25 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 3.25 + 0.75 x = 3.25 + 0.75 Combine like terms: 3.25 + 0.75 = 4 x = 4 Simplifying x = 4

Subproblem 2

x + -0.75 = -3.25 Simplifying x + -0.75 = -3.25 Reorder the terms: -0.75 + x = -3.25 Solving -0.75 + x = -3.25 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = -3.25 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -3.25 + 0.75 x = -3.25 + 0.75 Combine like terms: -3.25 + 0.75 = -2.5 x = -2.5 Simplifying x = -2.5

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4, -2.5}

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