􀍺􀍲􀜳􀍺􀍲0=80Q-0,05Q 2

Let's solve this equation for q

 

\(0=80q-0.05q\)	Combine like terms on the right hand side of the equation
\(0=79.95q\)	Divide by \(79.95 \) on both sides of the equation
\(0=q\)	We're done!

He/she doesn't mean that, TheXSquaredFactor.

\(0 = 80q-0.05q^2\\ 0.05q^2-80q = 0\\ q^2 - 1600q=0\\ q(q-1600)=0\\ \text{Set each factor to 0}\\ q= 0\text{ or }q = 1600\)