Question

Evaluate {[999]-1}

find​

Answer 1

Hi I think you have written question wrong the question would be {[999²-1}

Answer:

998000

Step-by-step explanation:

Given: { ( 999²-1 }

The question can be written as { ( 992)²-1² }

Using the formula

( a² - b²) = ( a + b )( a - b)

{ (999²-1²}

= [ ( 999+1)(999-1) ]

On further calculation

{(999²) - 1²} = 1000×998

{ (999)² -1² = 998000.