4.5(x)(x)+7x-1.5=0

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Solution for 4.5(x)(x)+7x-1.5=0 equation:


Simplifying
4.5(x)(x) + 7x + -1.5 = 0

Multiply x * x
4.5x2 + 7x + -1.5 = 0

Reorder the terms:
-1.5 + 7x + 4.5x2 = 0

Solving
-1.5 + 7x + 4.5x2 = 0

Solving for variable 'x'.

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

Divide each side by '4.5'.
-0.3333333333 + 1.555555556x + x2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + 1.555555556x + 0.3333333333 + x2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + 1.555555556x + x2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + 1.555555556x + x2 = 0 + 0.3333333333
1.555555556x + x2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
1.555555556x + x2 = 0.3333333333

The x term is 1.555555556x.  Take half its coefficient (0.777777778).
Square it (0.6049382720) and add it to both sides.

Add '0.6049382720' to each side of the equation.
1.555555556x + 0.6049382720 + x2 = 0.3333333333 + 0.6049382720

Reorder the terms:
0.6049382720 + 1.555555556x + x2 = 0.3333333333 + 0.6049382720

Combine like terms: 0.3333333333 + 0.6049382720 = 0.9382716053
0.6049382720 + 1.555555556x + x2 = 0.9382716053

Factor a perfect square on the left side:
(x + 0.777777778)(x + 0.777777778) = 0.9382716053

Calculate the square root of the right side: 0.96864421

Break this problem into two subproblems by setting 
(x + 0.777777778) equal to 0.96864421 and -0.96864421.

Subproblem 1

x + 0.777777778 = 0.96864421 Simplifying x + 0.777777778 = 0.96864421 Reorder the terms: 0.777777778 + x = 0.96864421 Solving 0.777777778 + x = 0.96864421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.777777778' to each side of the equation. 0.777777778 + -0.777777778 + x = 0.96864421 + -0.777777778 Combine like terms: 0.777777778 + -0.777777778 = 0.000000000 0.000000000 + x = 0.96864421 + -0.777777778 x = 0.96864421 + -0.777777778 Combine like terms: 0.96864421 + -0.777777778 = 0.190866432 x = 0.190866432 Simplifying x = 0.190866432

Subproblem 2

x + 0.777777778 = -0.96864421 Simplifying x + 0.777777778 = -0.96864421 Reorder the terms: 0.777777778 + x = -0.96864421 Solving 0.777777778 + x = -0.96864421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.777777778' to each side of the equation. 0.777777778 + -0.777777778 + x = -0.96864421 + -0.777777778 Combine like terms: 0.777777778 + -0.777777778 = 0.000000000 0.000000000 + x = -0.96864421 + -0.777777778 x = -0.96864421 + -0.777777778 Combine like terms: -0.96864421 + -0.777777778 = -1.746421988 x = -1.746421988 Simplifying x = -1.746421988

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.190866432, -1.746421988}

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