Math, asked by Aitudegirl, 1 month ago

using the formula:
(a-b)² = (a²- 2ab+b²)

evalute:-
(861)²

Answers

Answered by lakshyakhatri3163

2

Answer:

(1000-139)² = 1000²+139²-(2)(1000)(139)

= 1000000+19321-278000

Step-by-step explanation:

hence, answer :- 741321.

mark me brainliest...!

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