4a^2+15-25=0

Solution for 4a^2+15-25=0 equation:

Simplifying
4a2 + 15 + -25 = 0

Reorder the terms:
15 + -25 + 4a2 = 0

Combine like terms: 15 + -25 = -10
-10 + 4a2 = 0

Solving
-10 + 4a2 = 0

Solving for variable 'a'.

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

Add '10' to each side of the equation.
-10 + 10 + 4a2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + 4a2 = 0 + 10
4a2 = 0 + 10

Combine like terms: 0 + 10 = 10
4a2 = 10

Divide each side by '4'.
a2 = 2.5

Simplifying
a2 = 2.5

Take the square root of each side:
a = {-1.58113883, 1.58113883}