How do you factor: pi r^2 + pi rl

Since ll is on the right side of the equation, switch the sides so it is on the left side of the equation. pr l + p r2 = s p⁢r ⁢l + p⁢ r2 = s Since p r2 p⁢ r2 does not contain the variable to solve for, move it to the right side of the equation by subtracting p r2 p⁢ r2 from both sides. pr l = - p r2 + s p⁢r ⁢l = - ⁢p ⁢ r2 + s Divide each term by pr p⁢r and simplify. Divide each term in pr l = - p r2 + s p⁢r ⁢l = - ⁢p ⁢ r2 + s by pr p⁢r. pr l pr = - p r2 pr + s pr p⁢r ⁢l p⁢r = - ⁢ p⁢ r2 p⁢r + s p⁢r Simplify the left side of the equation by cancelling the common factors. l = - p r2 pr + s pr l = - ⁢ p⁢ r2 p⁢r + s p⁢r Simplify each term.

l = - r + s pr