Question

use a suitable identity to compute (4abc-5)(4abc-7)​

Answer 1

Step-by-step explanation:

use a suitable identity to compute (4abc-5)(4abc-7)

identity:(x-a)(x-b)=x²-x(a+b)+ab

let, x= 4abc,a=5,b=7

(4abc-5)(4abc-7)

=(4abc)²-4abc(5+7)+(5)(7)

=16a²b²c²-4abc(12)+35

=16a²b²c²-48abc+35