4.5x^2+4x+3.5=4x^2

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Solution for 4.5x^2+4x+3.5=4x^2 equation:


Simplifying
4.5x2 + 4x + 3.5 = 4x2

Reorder the terms:
3.5 + 4x + 4.5x2 = 4x2

Solving
3.5 + 4x + 4.5x2 = 4x2

Solving for variable 'x'.

Combine like terms: 4.5x2 + -4x2 = 0.5x2
3.5 + 4x + 0.5x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
3.5 + 4x + 0.5x2 = 0

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

Divide each side by '0.5'.
7 + 8x + x2 = 0

Move the constant term to the right:

Add '-7' to each side of the equation.
7 + 8x + -7 + x2 = 0 + -7

Reorder the terms:
7 + -7 + 8x + x2 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + 8x + x2 = 0 + -7
8x + x2 = 0 + -7

Combine like terms: 0 + -7 = -7
8x + x2 = -7

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = -7 + 16

Reorder the terms:
16 + 8x + x2 = -7 + 16

Combine like terms: -7 + 16 = 9
16 + 8x + x2 = 9

Factor a perfect square on the left side:
(x + 4)(x + 4) = 9

Calculate the square root of the right side: 3

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

Subproblem 1

x + 4 = 3 Simplifying x + 4 = 3 Reorder the terms: 4 + x = 3 Solving 4 + x = 3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 3 + -4 Combine like terms: 4 + -4 = 0 0 + x = 3 + -4 x = 3 + -4 Combine like terms: 3 + -4 = -1 x = -1 Simplifying x = -1

Subproblem 2

x + 4 = -3 Simplifying x + 4 = -3 Reorder the terms: 4 + x = -3 Solving 4 + x = -3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -3 + -4 Combine like terms: 4 + -4 = 0 0 + x = -3 + -4 x = -3 + -4 Combine like terms: -3 + -4 = -7 x = -7 Simplifying x = -7

Solution

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

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