Question

use(a-b)² =a²-2ab+b² to find the value of..
1.. (199)²
2.. (1005)²
3.. (103)²
plzz give me answer

Answer 1

Answer:

1. (200-1)² = 200² -2x200x1 + 1²

=40000-400+1 = 39601

2. (1010-5)² = 1020100+ 25 - 10100=1010025

3.(105-2)² = 11025 + 4 -420= 10609

Answer 2

Step-by-step explanation:

(a - b)² = a² - 2ab + b²

1. (199)²

= (200 - 1)²

= (200)² - (2 × 200 × 1) + (1)²

= 40000 - 400 + 1

= 40001 - 400

= 39601

2. (1005)²

= (1010 - 5)²

= (1010)² - (2 × 1010 × 5)+(5)²

= 1020100 - 10100 + 25

= 1020125 - 10100

= 1010025

3. (103)²

= (105 - 2)²

= (105)² - (2 × 105 × 2) + (2)²

= 11025 - 420 + 4

= 11029 - 420

= 10609

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