Question

(2ab-7a-4) - (7ab-4)
Hi plz help

Answer 1

Explanation:

(2ab-7a-4) - (7ab-4)

= 2ab - 7a - 4 - 7ab +4

(-) × (-) = (+)

(-) × (-) = (+)-(-4)= +4

then 4 will be cancelled

= 2ab - 7ab - 7a

= -5ab -7a