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Stella [2.4K]
3 years ago
6

Help me plz? Plllzzzz?

Mathematics
1 answer:
Tamiku [17]3 years ago
6 0
Answer: a). 11449 b). 39996 e). 996004

Explanation:

107^2
= (100+7)^2
= (100+7)(100+7)
= 10000 + 700 + 700+ 49
= 10000 + 1400 + 49
= 11449

198 x 202
= (200-2)(200+2)
= 40000 - 4
= 39996

998^2
= (1000-2)(1000-2)
= 1000000 - 2000 - 2000 + 4
= 1000000 - 4000 + 4
= 996000 + 4
= 996004
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