(x+3)(x+5)=x

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Solution for (x+3)(x+5)=x equation:


Simplifying
(x + 3)(x + 5) = x

Reorder the terms:
(3 + x)(x + 5) = x

Reorder the terms:
(3 + x)(5 + x) = x

Multiply (3 + x) * (5 + x)
(3(5 + x) + x(5 + x)) = x
((5 * 3 + x * 3) + x(5 + x)) = x
((15 + 3x) + x(5 + x)) = x
(15 + 3x + (5 * x + x * x)) = x
(15 + 3x + (5x + x2)) = x

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

Solving
15 + 8x + x2 = x

Solving for variable 'x'.

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

Combine like terms: 8x + -1x = 7x
15 + 7x + x2 = x + -1x

Combine like terms: x + -1x = 0
15 + 7x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-15' to each side of the equation.
15 + 7x + -15 + x2 = 0 + -15

Reorder the terms:
15 + -15 + 7x + x2 = 0 + -15

Combine like terms: 15 + -15 = 0
0 + 7x + x2 = 0 + -15
7x + x2 = 0 + -15

Combine like terms: 0 + -15 = -15
7x + x2 = -15

The x term is 7x.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7x + 12.25 + x2 = -15 + 12.25

Reorder the terms:
12.25 + 7x + x2 = -15 + 12.25

Combine like terms: -15 + 12.25 = -2.75
12.25 + 7x + x2 = -2.75

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = -2.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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