-4a^2+25=0

Solution for -4a^2+25=0 equation:

Simplifying
-4a2 + 25 = 0

Reorder the terms:
25 + -4a2 = 0

Solving
25 + -4a2 = 0

Solving for variable 'a'.

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

Add '-25' to each side of the equation.
25 + -25 + -4a2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + -4a2 = 0 + -25
-4a2 = 0 + -25

Combine like terms: 0 + -25 = -25
-4a2 = -25

Divide each side by '-4'.
a2 = 6.25

Simplifying
a2 = 6.25

Take the square root of each side:
a = {-2.5, 2.5}