Question

(891) ^2 using formula a^2-2ab+b^2​

Answer 1

Step-by-step explanation:

(900-9)^2 = 900^2-2×900×9+9^2

Answer 2

Answer:

Step-by-step explanation

Given (891)2

We have (a – b)2 = (a2 – 2ab + b2)

(891)2 can be written as 900-9

So here a=900 and b=9

Using the formula,

(900 – 9)2 = (9002 – 2 X 900 X 9 + 92)

On simplifying we get

(900 – 9)2 = (810000 – 16200 +81) (891)2 = 793881

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