Question

Please completely factor this expression.

5c^2 -24cd -5d^2


Thank you!

Answer 1

let's see we need 5*5-1 in the middle

something of form
(5c ) ( 5)

(5c-1) (c +5)NO that gives +24, we want -

(5c+1)(c-5) = 5c^2 -24c -5 progress
so
(5c+d)(c-5d) = 5c^2 -24cd -5d^2
done