2a-6a^2+5
=-6a^2+2a+5
=-6(a^2-a/3-5/6)
=-6(a^2-a/3+1/36-1/36-5/6)
=-6[(a-1/6)^2-31/36]
=-6(a-1/6-√31/6)(a-1/6+√31/6)
=-(6a-1-√31)(a-1/6+√31/6)
2a-6a^2+5
=-6a^2+2a+5
=-6(a^2-a/3-5/6)
=-6(a^2-a/3+1/36-1/36-5/6)
=-6[(a-1/6)^2-31/36]
=-6(a-1/6-√31/6)(a-1/6+√31/6)
=-(6a-1-√31)(a-1/6+√31/6)