(7x+8)-(-3x)(-3x)-5x+8=

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Solution for (7x+8)-(-3x)(-3x)-5x+8= equation:


Simplifying
(7x + 8) + -1(-3x)(-3x) + -5x + 8 = 0

Reorder the terms:
(8 + 7x) + -1(-3x)(-3x) + -5x + 8 = 0

Remove parenthesis around (8 + 7x)
8 + 7x + -1(-3x)(-3x) + -5x + 8 = 0

Remove parenthesis around (-3x)
8 + 7x + -1 * -3x(-3x) + -5x + 8 = 0

Remove parenthesis around (-3x)
8 + 7x + -1 * -3x * -3x + -5x + 8 = 0

Reorder the terms for easier multiplication:
8 + 7x + -1 * -3 * -3x * x + -5x + 8 = 0

Multiply -1 * -3
8 + 7x + 3 * -3x * x + -5x + 8 = 0

Multiply 3 * -3
8 + 7x + -9x * x + -5x + 8 = 0

Multiply x * x
8 + 7x + -9x2 + -5x + 8 = 0

Reorder the terms:
8 + 8 + 7x + -5x + -9x2 = 0

Combine like terms: 8 + 8 = 16
16 + 7x + -5x + -9x2 = 0

Combine like terms: 7x + -5x = 2x
16 + 2x + -9x2 = 0

Solving
16 + 2x + -9x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-9 the coefficient of the squared term: 

Divide each side by '-9'.
-1.777777778 + -0.2222222222x + x2 = 0

Move the constant term to the right:

Add '1.777777778' to each side of the equation.
-1.777777778 + -0.2222222222x + 1.777777778 + x2 = 0 + 1.777777778

Reorder the terms:
-1.777777778 + 1.777777778 + -0.2222222222x + x2 = 0 + 1.777777778

Combine like terms: -1.777777778 + 1.777777778 = 0.000000000
0.000000000 + -0.2222222222x + x2 = 0 + 1.777777778
-0.2222222222x + x2 = 0 + 1.777777778

Combine like terms: 0 + 1.777777778 = 1.777777778
-0.2222222222x + x2 = 1.777777778

The x term is -0.2222222222x.  Take half its coefficient (-0.1111111111).
Square it (0.01234567901) and add it to both sides.

Add '0.01234567901' to each side of the equation.
-0.2222222222x + 0.01234567901 + x2 = 1.777777778 + 0.01234567901

Reorder the terms:
0.01234567901 + -0.2222222222x + x2 = 1.777777778 + 0.01234567901

Combine like terms: 1.777777778 + 0.01234567901 = 1.79012345701
0.01234567901 + -0.2222222222x + x2 = 1.79012345701

Factor a perfect square on the left side:
(x + -0.1111111111)(x + -0.1111111111) = 1.79012345701

Calculate the square root of the right side: 1.337954953

Break this problem into two subproblems by setting 
(x + -0.1111111111) equal to 1.337954953 and -1.337954953.

Subproblem 1

x + -0.1111111111 = 1.337954953 Simplifying x + -0.1111111111 = 1.337954953 Reorder the terms: -0.1111111111 + x = 1.337954953 Solving -0.1111111111 + x = 1.337954953 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1111111111' to each side of the equation. -0.1111111111 + 0.1111111111 + x = 1.337954953 + 0.1111111111 Combine like terms: -0.1111111111 + 0.1111111111 = 0.0000000000 0.0000000000 + x = 1.337954953 + 0.1111111111 x = 1.337954953 + 0.1111111111 Combine like terms: 1.337954953 + 0.1111111111 = 1.4490660641 x = 1.4490660641 Simplifying x = 1.4490660641

Subproblem 2

x + -0.1111111111 = -1.337954953 Simplifying x + -0.1111111111 = -1.337954953 Reorder the terms: -0.1111111111 + x = -1.337954953 Solving -0.1111111111 + x = -1.337954953 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1111111111' to each side of the equation. -0.1111111111 + 0.1111111111 + x = -1.337954953 + 0.1111111111 Combine like terms: -0.1111111111 + 0.1111111111 = 0.0000000000 0.0000000000 + x = -1.337954953 + 0.1111111111 x = -1.337954953 + 0.1111111111 Combine like terms: -1.337954953 + 0.1111111111 = -1.2268438419 x = -1.2268438419 Simplifying x = -1.2268438419

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.4490660641, -1.2268438419}

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