x*2-4x-5=0

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Solution for x*2-4x-5=0 equation:


Simplifying
x * 2 + -4x + -5 = 0

Reorder the terms for easier multiplication:
2x + -4x + -5 = 0

Reorder the terms:
-5 + 2x + -4x = 0

Combine like terms: 2x + -4x = -2x
-5 + -2x = 0

Solving
-5 + -2x = 0

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + -2x = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -2x = 0 + 5
-2x = 0 + 5

Combine like terms: 0 + 5 = 5
-2x = 5

Divide each side by '-2'.
x = -2.5

Simplifying
x = -2.5

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