Question

step by step please​

Answer 1

Answer:

to find, 1998 * 2002

= ( 2000 -2)( 2000 + 2)

= 2000² - 2²

= 4000000 - 4

= 3999996

Step-by-step explanation:

formula used

(a + b)(a - b) = a² - b².

$.$

Answer 2

Answer:

1998×2002=3999996

it can't be explained in step. it's simple multiplication.

Step-by-step explanation:

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