Question

How do you factor `4a^2-28a+48`?

Answer 1

`4a^2-28a+48=4(a-3)(a-4)`

It's a quadratic so:

`Delta=(-28)^2-4*4*48=16`
`sqrt(Delta)=4`

`a_1=(-(-28)-4)/(2*4)=24/8=3`
`a_2=(-(-28)+4)/(2*4)=32/8=4`