10r^2-9=3

Solution for 10r^2-9=3 equation:

Simplifying
10r2 + -9 = 3

Reorder the terms:
-9 + 10r2 = 3

Solving
-9 + 10r2 = 3

Solving for variable 'r'.

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

Add '9' to each side of the equation.
-9 + 9 + 10r2 = 3 + 9

Combine like terms: -9 + 9 = 0
0 + 10r2 = 3 + 9
10r2 = 3 + 9

Combine like terms: 3 + 9 = 12
10r2 = 12

Divide each side by '10'.
r2 = 1.2

Simplifying
r2 = 1.2

Take the square root of each side:
r = {-1.095445115, 1.095445115}