2a^2-17-9=0

Solution for 2a^2-17-9=0 equation:

Simplifying
2a2 + -17 + -9 = 0

Reorder the terms:
-17 + -9 + 2a2 = 0

Combine like terms: -17 + -9 = -26
-26 + 2a2 = 0

Solving
-26 + 2a2 = 0

Solving for variable 'a'.

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

Add '26' to each side of the equation.
-26 + 26 + 2a2 = 0 + 26

Combine like terms: -26 + 26 = 0
0 + 2a2 = 0 + 26
2a2 = 0 + 26

Combine like terms: 0 + 26 = 26
2a2 = 26

Divide each side by '2'.
a2 = 13

Simplifying
a2 = 13

Take the square root of each side:
a = {-3.605551275, 3.605551275}