25v^2+40v-40v-64=0

Solution for 25v^2+40v-40v-64=0 equation:

Simplifying
25v2 + 40v + -40v + -64 = 0

Reorder the terms:
-64 + 40v + -40v + 25v2 = 0

Combine like terms: 40v + -40v = 0
-64 + 0 + 25v2 = 0
-64 + 25v2 = 0

Solving
-64 + 25v2 = 0

Solving for variable 'v'.

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

Add '64' to each side of the equation.
-64 + 64 + 25v2 = 0 + 64

Combine like terms: -64 + 64 = 0
0 + 25v2 = 0 + 64
25v2 = 0 + 64

Combine like terms: 0 + 64 = 64
25v2 = 64

Divide each side by '25'.
v2 = 2.56

Simplifying
v2 = 2.56

Take the square root of each side:
v = {-1.6, 1.6}