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

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


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

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

Multiply (-3 + x) * (7 + -1x)
(-3(7 + -1x) + x(7 + -1x)) = 5
((7 * -3 + -1x * -3) + x(7 + -1x)) = 5
((-21 + 3x) + x(7 + -1x)) = 5
(-21 + 3x + (7 * x + -1x * x)) = 5
(-21 + 3x + (7x + -1x2)) = 5

Combine like terms: 3x + 7x = 10x
(-21 + 10x + -1x2) = 5

Solving
-21 + 10x + -1x2 = 5

Solving for variable 'x'.

Reorder the terms:
-21 + -5 + 10x + -1x2 = 5 + -5

Combine like terms: -21 + -5 = -26
-26 + 10x + -1x2 = 5 + -5

Combine like terms: 5 + -5 = 0
-26 + 10x + -1x2 = 0

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

Divide each side by '-1'.
26 + -10x + x2 = 0

Move the constant term to the right:

Add '-26' to each side of the equation.
26 + -10x + -26 + x2 = 0 + -26

Reorder the terms:
26 + -26 + -10x + x2 = 0 + -26

Combine like terms: 26 + -26 = 0
0 + -10x + x2 = 0 + -26
-10x + x2 = 0 + -26

Combine like terms: 0 + -26 = -26
-10x + x2 = -26

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = -26 + 25

Reorder the terms:
25 + -10x + x2 = -26 + 25

Combine like terms: -26 + 25 = -1
25 + -10x + x2 = -1

Factor a perfect square on the left side:
(x + -5)(x + -5) = -1

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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