4. Verify the following.a) 18 x [7+(-3)] = [18 x 7] + [18 x – 3](b) (-66) * [(-8) – 7]= (-66) * (-8) – (-66)×7 About the author Delilah
a)18×(7-3)=(18×7)+(18×-3)
18(5)=18(7-3)=18(5)
b)
-66(-8-7)=-66(-8-7)