a^2+20a-1-a^2+8a-13=

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Solution for a^2+20a-1-a^2+8a-13= equation:


Simplifying
a2 + 20a + -1 + -1a2 + 8a + -13 = 0

Reorder the terms:
-1 + -13 + 20a + 8a + a2 + -1a2 = 0

Combine like terms: -1 + -13 = -14
-14 + 20a + 8a + a2 + -1a2 = 0

Combine like terms: 20a + 8a = 28a
-14 + 28a + a2 + -1a2 = 0

Combine like terms: a2 + -1a2 = 0
-14 + 28a + 0 = 0
-14 + 28a = 0

Solving
-14 + 28a = 0

Solving for variable 'a'.

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

Add '14' to each side of the equation.
-14 + 14 + 28a = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 28a = 0 + 14
28a = 0 + 14

Combine like terms: 0 + 14 = 14
28a = 14

Divide each side by '28'.
a = 0.5

Simplifying
a = 0.5

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