(x+9)(x-5)=x^2+1

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Solution for (x+9)(x-5)=x^2+1 equation:


Simplifying
(x + 9)(x + -5) = x2 + 1

Reorder the terms:
(9 + x)(x + -5) = x2 + 1

Reorder the terms:
(9 + x)(-5 + x) = x2 + 1

Multiply (9 + x) * (-5 + x)
(9(-5 + x) + x(-5 + x)) = x2 + 1
((-5 * 9 + x * 9) + x(-5 + x)) = x2 + 1
((-45 + 9x) + x(-5 + x)) = x2 + 1
(-45 + 9x + (-5 * x + x * x)) = x2 + 1
(-45 + 9x + (-5x + x2)) = x2 + 1

Combine like terms: 9x + -5x = 4x
(-45 + 4x + x2) = x2 + 1

Reorder the terms:
-45 + 4x + x2 = 1 + x2

Add '-1x2' to each side of the equation.
-45 + 4x + x2 + -1x2 = 1 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-45 + 4x + 0 = 1 + x2 + -1x2
-45 + 4x = 1 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-45 + 4x = 1 + 0
-45 + 4x = 1

Solving
-45 + 4x = 1

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '45' to each side of the equation.
-45 + 45 + 4x = 1 + 45

Combine like terms: -45 + 45 = 0
0 + 4x = 1 + 45
4x = 1 + 45

Combine like terms: 1 + 45 = 46
4x = 46

Divide each side by '4'.
x = 11.5

Simplifying
x = 11.5

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