Question

the suitable expansion for 993*2​

Answer 1

Answer:

(1000-7)*2

Step-by-step explanation:

It is in the form of (a-b)*2

so it's (1000-7)*2....

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Answer 2

Step-by-step explanation:

We write 99 100 1 (99)3

=(100 1)3 Using (a - b)3 = a³ -63- 3ab(a - b)

Where a = 100 & b 1

= (100)3 – (1)3 – 3(100) (1) (100 – 1) 1000000 – 1- 300(99) 1000000 –1- 29700

= 970299