-1.5x^2+1.5x+45=.1x^2+.5x+10

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Solution for -1.5x^2+1.5x+45=.1x^2+.5x+10 equation:


Simplifying
-1.5x2 + 1.5x + 45 = 0.1x2 + 0.5x + 10

Reorder the terms:
45 + 1.5x + -1.5x2 = 0.1x2 + 0.5x + 10

Reorder the terms:
45 + 1.5x + -1.5x2 = 10 + 0.5x + 0.1x2

Solving
45 + 1.5x + -1.5x2 = 10 + 0.5x + 0.1x2

Solving for variable 'x'.

Reorder the terms:
45 + -10 + 1.5x + -0.5x + -1.5x2 + -0.1x2 = 10 + 0.5x + 0.1x2 + -10 + -0.5x + -0.1x2

Combine like terms: 45 + -10 = 35
35 + 1.5x + -0.5x + -1.5x2 + -0.1x2 = 10 + 0.5x + 0.1x2 + -10 + -0.5x + -0.1x2

Combine like terms: 1.5x + -0.5x = 1x
35 + 1x + -1.5x2 + -0.1x2 = 10 + 0.5x + 0.1x2 + -10 + -0.5x + -0.1x2

Combine like terms: -1.5x2 + -0.1x2 = -1.6x2
35 + 1x + -1.6x2 = 10 + 0.5x + 0.1x2 + -10 + -0.5x + -0.1x2

Reorder the terms:
35 + 1x + -1.6x2 = 10 + -10 + 0.5x + -0.5x + 0.1x2 + -0.1x2

Combine like terms: 10 + -10 = 0
35 + 1x + -1.6x2 = 0 + 0.5x + -0.5x + 0.1x2 + -0.1x2
35 + 1x + -1.6x2 = 0.5x + -0.5x + 0.1x2 + -0.1x2

Combine like terms: 0.5x + -0.5x = 0.0
35 + 1x + -1.6x2 = 0.0 + 0.1x2 + -0.1x2
35 + 1x + -1.6x2 = 0.1x2 + -0.1x2

Combine like terms: 0.1x2 + -0.1x2 = 0.0
35 + 1x + -1.6x2 = 0.0

Begin completing the square.  Divide all terms by
-1.6 the coefficient of the squared term: 

Divide each side by '-1.6'.
-21.875 + -0.625x + x2 = 0

Move the constant term to the right:

Add '21.875' to each side of the equation.
-21.875 + -0.625x + 21.875 + x2 = 0 + 21.875

Reorder the terms:
-21.875 + 21.875 + -0.625x + x2 = 0 + 21.875

Combine like terms: -21.875 + 21.875 = 0.000
0.000 + -0.625x + x2 = 0 + 21.875
-0.625x + x2 = 0 + 21.875

Combine like terms: 0 + 21.875 = 21.875
-0.625x + x2 = 21.875

The x term is -0.625x.  Take half its coefficient (-0.3125).
Square it (0.09765625) and add it to both sides.

Add '0.09765625' to each side of the equation.
-0.625x + 0.09765625 + x2 = 21.875 + 0.09765625

Reorder the terms:
0.09765625 + -0.625x + x2 = 21.875 + 0.09765625

Combine like terms: 21.875 + 0.09765625 = 21.97265625
0.09765625 + -0.625x + x2 = 21.97265625

Factor a perfect square on the left side:
(x + -0.3125)(x + -0.3125) = 21.97265625

Calculate the square root of the right side: 4.6875

Break this problem into two subproblems by setting 
(x + -0.3125) equal to 4.6875 and -4.6875.

Subproblem 1

x + -0.3125 = 4.6875 Simplifying x + -0.3125 = 4.6875 Reorder the terms: -0.3125 + x = 4.6875 Solving -0.3125 + x = 4.6875 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3125' to each side of the equation. -0.3125 + 0.3125 + x = 4.6875 + 0.3125 Combine like terms: -0.3125 + 0.3125 = 0.0000 0.0000 + x = 4.6875 + 0.3125 x = 4.6875 + 0.3125 Combine like terms: 4.6875 + 0.3125 = 5 x = 5 Simplifying x = 5

Subproblem 2

x + -0.3125 = -4.6875 Simplifying x + -0.3125 = -4.6875 Reorder the terms: -0.3125 + x = -4.6875 Solving -0.3125 + x = -4.6875 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3125' to each side of the equation. -0.3125 + 0.3125 + x = -4.6875 + 0.3125 Combine like terms: -0.3125 + 0.3125 = 0.0000 0.0000 + x = -4.6875 + 0.3125 x = -4.6875 + 0.3125 Combine like terms: -4.6875 + 0.3125 = -4.375 x = -4.375 Simplifying x = -4.375

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5, -4.375}

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