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Many thanks.

## Homework Statement

**Q.**The area of a triangle is [itex]\frac{-4m^2 + 4m - 1}{m}[/itex]. Find the value of m via differentiation.

## Homework Equations

## The Attempt at a Solution

**Attempt:**[itex]\frac{dA}{dm}[/itex] = [itex]\frac{4m^2 - 4m - 1}{m^2}[/itex] = 0 => 4m

^{2}- 4m + 1 = 0 => (2m - 1)(2m - 1) => m = 1/2

**Ans.**: (From text book): [itex]\frac{dA}{dm}[/itex] = [itex]\frac{-4m^2 + 1}{m^2}[/itex] = 0 => m = +/- 1/2