Question

(7p-7r)(4p-3r)

Answer 1

(7p-7r)(4p-3r)


(7p)(4p)+(7p)(-3r)+(-7r)(4p)+(-7r)(-3r)


28p^2-21rp-28rp+21r^2


28p^2-49rp+21r^2


So (7p-7r)(4p-3r)=28p^2-49rp+21r^2

Answer 2

Thanks you just helped a lot. I wasn't sure If I was doing them right :]