15x-x^2=50 x^2-15x+50=0 (x-10)(x-5)=0 x-10=0 x1=10 x-5=0 x2=5 15x-x^2=50 x^2-15x+50=0 (x-10)(x-5)=0 x-10=0 x1=10 x-5=0 x2=5