(20a^4-4a^3b)/4a=(4a^3(5a-b))/4a=a^2(5a-b) =>a=3, b=-4, 3^2(5*3-(-4)=9(15+4)=9*18=171
4a^3(5a-b)/4a=a^2(5a-b)9(15+4)=171
(20a^4-4a^3b)/4a=(4a^3(5a-b))/4a=a^2(5a-b) =>a=3, b=-4, 3^2(5*3-(-4)=9(15+4)=9*18=171
4a^3(5a-b)/4a=a^2(5a-b)
9(15+4)=171