pls can anyone solve this question please solve only b,c,d it's urgent
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a. 48 × 56 = ( 40 + 8 ) ( 40 + 16 )
= ( 40)2 + ( 8 + 16 ) 40 + ( 8 ) ( 16 )
= 1600 + 960 + 128
= 2688
b. 12 × 18 = ( 10 + 2 ) ( 10 + 8 )
= ( 10 )2 + ( 2 + 8 ) 10 + ( 2 ) ( 8 )
= 100 + 100 + 16
= 216
c. 99 × 104 = ( 90 + 9 ) ( 90 + 14 )
= (90)2 + ( 9 + 14 ) 90 + ( 9 ) ( 14 )
= 8100 + 2070 + 126
= 10296
d. 198 × 204 = try it yourself
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