9(x-4)-x(x+3)+8(x^2+9)=

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Solution for 9(x-4)-x(x+3)+8(x^2+9)= equation:


Simplifying
9(x + -4) + -1x(x + 3) + 8(x2 + 9) = 0

Reorder the terms:
9(-4 + x) + -1x(x + 3) + 8(x2 + 9) = 0
(-4 * 9 + x * 9) + -1x(x + 3) + 8(x2 + 9) = 0
(-36 + 9x) + -1x(x + 3) + 8(x2 + 9) = 0

Reorder the terms:
-36 + 9x + -1x(3 + x) + 8(x2 + 9) = 0
-36 + 9x + (3 * -1x + x * -1x) + 8(x2 + 9) = 0
-36 + 9x + (-3x + -1x2) + 8(x2 + 9) = 0

Reorder the terms:
-36 + 9x + -3x + -1x2 + 8(9 + x2) = 0
-36 + 9x + -3x + -1x2 + (9 * 8 + x2 * 8) = 0
-36 + 9x + -3x + -1x2 + (72 + 8x2) = 0

Reorder the terms:
-36 + 72 + 9x + -3x + -1x2 + 8x2 = 0

Combine like terms: -36 + 72 = 36
36 + 9x + -3x + -1x2 + 8x2 = 0

Combine like terms: 9x + -3x = 6x
36 + 6x + -1x2 + 8x2 = 0

Combine like terms: -1x2 + 8x2 = 7x2
36 + 6x + 7x2 = 0

Solving
36 + 6x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
5.142857143 + 0.8571428571x + x2 = 0

Move the constant term to the right:

Add '-5.142857143' to each side of the equation.
5.142857143 + 0.8571428571x + -5.142857143 + x2 = 0 + -5.142857143

Reorder the terms:
5.142857143 + -5.142857143 + 0.8571428571x + x2 = 0 + -5.142857143

Combine like terms: 5.142857143 + -5.142857143 = 0.000000000
0.000000000 + 0.8571428571x + x2 = 0 + -5.142857143
0.8571428571x + x2 = 0 + -5.142857143

Combine like terms: 0 + -5.142857143 = -5.142857143
0.8571428571x + x2 = -5.142857143

The x term is 0.8571428571x.  Take half its coefficient (0.4285714286).
Square it (0.1836734694) and add it to both sides.

Add '0.1836734694' to each side of the equation.
0.8571428571x + 0.1836734694 + x2 = -5.142857143 + 0.1836734694

Reorder the terms:
0.1836734694 + 0.8571428571x + x2 = -5.142857143 + 0.1836734694

Combine like terms: -5.142857143 + 0.1836734694 = -4.9591836736
0.1836734694 + 0.8571428571x + x2 = -4.9591836736

Factor a perfect square on the left side:
(x + 0.4285714286)(x + 0.4285714286) = -4.9591836736

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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