(5-x)(x-3)-8=0

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Solution for (5-x)(x-3)-8=0 equation:


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

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

Multiply (5 + -1x) * (-3 + x)
(5(-3 + x) + -1x * (-3 + x)) + -8 = 0
((-3 * 5 + x * 5) + -1x * (-3 + x)) + -8 = 0
((-15 + 5x) + -1x * (-3 + x)) + -8 = 0
(-15 + 5x + (-3 * -1x + x * -1x)) + -8 = 0
(-15 + 5x + (3x + -1x2)) + -8 = 0

Combine like terms: 5x + 3x = 8x
(-15 + 8x + -1x2) + -8 = 0

Reorder the terms:
-15 + -8 + 8x + -1x2 = 0

Combine like terms: -15 + -8 = -23
-23 + 8x + -1x2 = 0

Solving
-23 + 8x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
23 + -8x + x2 = 0

Move the constant term to the right:

Add '-23' to each side of the equation.
23 + -8x + -23 + x2 = 0 + -23

Reorder the terms:
23 + -23 + -8x + x2 = 0 + -23

Combine like terms: 23 + -23 = 0
0 + -8x + x2 = 0 + -23
-8x + x2 = 0 + -23

Combine like terms: 0 + -23 = -23
-8x + x2 = -23

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 = -23 + 16

Reorder the terms:
16 + -8x + x2 = -23 + 16

Combine like terms: -23 + 16 = -7
16 + -8x + x2 = -7

Factor a perfect square on the left side:
(x + -4)(x + -4) = -7

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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