-x^2+2a+6=0

Solution for -x^2+2a+6=0 equation:

Simplifying
-1x2 + 2a + 6 = 0

Reorder the terms:
6 + 2a + -1x2 = 0

Solving
6 + 2a + -1x2 = 0

Solving for variable 'a'.

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

Add '-6' to each side of the equation.
6 + 2a + -6 + -1x2 = 0 + -6

Reorder the terms:
6 + -6 + 2a + -1x2 = 0 + -6

Combine like terms: 6 + -6 = 0
0 + 2a + -1x2 = 0 + -6
2a + -1x2 = 0 + -6

Combine like terms: 0 + -6 = -6
2a + -1x2 = -6

Add 'x2' to each side of the equation.
2a + -1x2 + x2 = -6 + x2

Combine like terms: -1x2 + x2 = 0
2a + 0 = -6 + x2
2a = -6 + x2

Divide each side by '2'.
a = -3 + 0.5x2

Simplifying
a = -3 + 0.5x2